Alphabetical Dictionary of Number Words

expression	meaning
numeracy	The noun "numeracy" means "the capacity to understand and work with numbers."
a	The indefinite article "a" means "one (1)." Usage: The indefinite article "a" should be used before a consonant sound, and the indefinite article "an" should be used before a vowel sound. Example: "Enclose an envelope with a stamp."
a-	The metric prefix symbol a- (metric prefix: "atto-" ) denotes a multiple of ten to the negative eighteenth power (10^-18 = 1E-18 = 0.000 000 000 000 000 001) as defined by Le Système International d'Unités (SI).
ace	1. The noun and adjective "ace" means "one (1)." An "ace" in parlor games is "a playing card, die, or domino that represents the number one." An "ace" in golf is "a hole made in one stroke," also called a "hole-in-one." An "ace" in racket sports, volleyball, or handball is "a point made on a serve without contact by the opponent."
	2. The noun and adjective "ace" means "of first (1^st) or high rank or quality."
	3. In military aviation, the noun "ace" means "an aviator who has destroyed five (5) or more enemy aircraft." More generally, "ace" means "one who excels at something."
affirmative	The adjective and noun "affirmative" is a logical value. "Negative" and "affirmative" are sometimes used as a binary logic pair.
algebraic number	An algebraic number is a number that can be expressed as a root of a polynomial equation with integer coefficients. Examples include 0, 1, i, 2^½, φ, -3.456, 7+8i, 9·e^i·π/4, etc. See also "Algebraic Number."
all	The pronoun and adjective "all" means "the whole of" or "every member of."
almost	The adverb and adjective "almost" means "slightly less than the specified amount."
American System	The "American number naming system" or "American System" is commonly used in North America and many other places to name very large and very small numbers. The "American System" is derived from the earlier "Chuquet System." The "American System" uses a Latin-based numeric prefix to denote a one-plus-an-integer power of one thousand (1,000 = 10³ = 1E+03), thus: "(prefix)illion" = 1,000^(1+prefix) = 10^{3×(1+prefix)} Example: In the "American System," one billion = 10^3×(1+2) = 10^3×3 = 10⁹ = 1E+09 = 1,000,000,000. See also Number Naming Systems.
an	The indefinite article "an" means "one (1)." See usage note at "a."
annual	The adjective "annual" means "recurring once (1) each year." See also "yearly."
Apéry's Constant	"Apéry's Constant" is an irrational number approximately 1.202 056 903 160. See also "Apéry's Constant."
Archimedes' Constant	"Archimedes' Constant" (symbol: π {Greek lower case letter pi} ) is the ratio of the circumference of a circle to its diameter. π is a transcendental number approximately 3.141 592 653 590. An Egyptian scribe named Ahmes (about 1680-1620 BC) described a (then several hundred year old) calculation of π to be 256/81 = 3.160. Greek mathematician and scientist Archimedes (287-212 BC) estimated the value of π to be 211875/67441 = 3.141 635. Chinese mathematician and astronomer Tsu Ch'ung Chi (430-501 AD) refined the value of π to 3.141 592 650. See also "Archimedes' Constant" and "Pi."
atto-	The metric prefix "atto-" (prefix symbol: a- ) denotes a multiple of ten to the negative eighteenth power (10^-18 = 1E-18 = 0.000 000 000 000 000 001) as defined by Le Système International d'Unités (SI).
azygous	The adjective "azygous" means "occurring singly (1) and not as a pair (2)."
B	The symbol "B" represents a logarithmic power measurement in bels.
baker's dozen	The compound noun "baker's dozen" means "thirteen (13)."
barely	The adverb "barely" means "only slightly more than a required minimum."
base	The noun and adjective "base" means "a number notation system based on the hyphenated suffix number." Thus, base_ten (base_10) is the common decimal positional number notation system. See also "numeral."
base eight	The compound noun and adjective "base eight (base_8)" means "a number notation system based on the number eight (8)." The modern octal or base eight positional number notation system uses the numerals 0, 1, 2, 3, 4, 5, 6, and 7 to represent the integers zero through seven. See also "base."
base five	The compound noun and adjective "base five (base_5)" means "a number notation system based on the number five (5)." See also "base."
base sixteen	The compound noun and adjective "base sixteen (base_16)" means "a number notation system based on the number sixteen (16)." The modern sexdecimal or base sixteen positional number notation system uses the numerals 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F to represent the integers zero through fifteen. See also "base."
base ten	The compound noun and adjective "base ten (base_10)" "a number notation system based on the number ten (10)." The common decimal or base ten positional number notation system uses the numerals 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 to represent the integers zero through nine. See also "base."
base twelve	The compound noun and adjective "base twelve (base_12)" means "a number notation system based on the number twelve (12)." See also "base."
base twenty	The compound noun and adjective "base twenty (base_20)" means "a number notation system based on the number twenty (20)." See also "base."
base two	The compound noun and adjective "base two (base_2)" means "a number notation system based on the number two (2)." The modern binary or base two positional number notation system uses the numerals 0 and 1 to represent the integers zero and one. See also "base."
bel	The noun and adjective "bel" (symbol: B ) is a logarithmic comparison of power levels representing "a ratio of ten (10)." Two (2) bels equal a power ratio of one hundred (100), and three (3) bels equal a power ratio of one thousand (1,000).
bi-	The Latin-based numeric prefix "bi-" means "two (2)."
biannual	The adjective "biannual" means "recurring twice (2) per year."
biathlon	The noun "biathlon" means "an athletic competition consisting of two (2) separate events."
bicentenary	1. The noun and adjective "bicentenary" means "a group of two hundred (200)."
	2. The noun and adjective "bicentenary" means "a period of two hundred (200) years."
	3. The noun and adjective "bicentenary" means "a two hundred (200) year anniversary."
	4. The adjective and noun "bicentenary" means "two hundredth (200th) in rank or order."
bicentennial	1. The adjective and noun "bicentennial" means "recurring every two hundred (200) years."
	2. The adjective and noun "bicentennial" means "lasting two hundred (200) years."
	3. The noun and adjective "bicentennial" means "a two hundred (200) year anniversary."
bicentennium	The noun and adjective "bicentennium" means "a period of two hundred (200) years."
bicentiquadragesimal	The adjective "bicentiquadragesimal" means "based on the number two hundred forty (240)." See also Base Number Systems.
bicentisexquinquagesimal	The adjective "bicentisexquinquagesimal" means "based on the number two hundred fifty-six (2⁸ = 256)." See also Base Number Systems.
bicolor	The adjective and noun "bicolor" means "having two (2) distinct colors."
bicycle	The noun, adjective, and verb "bicycle" means "having two (2) wheels."
biennary	The noun and adjective "biennary" means "a group of two (2) or a period of two (2) years."
biennial	1. The adjective and noun "biennial" means "recurring every two (2) years."
	2. The adjective and noun "biennial" means "lasting two (2) years."
	3. The noun and adjective "biennial" means "a two (2) year anniversary."
biennium	The noun and adjective "biennium" means "a period of two (2) years."
bigamist	The noun and adjective "bigamist" means "a person who is married (usually illegally) to two (2) (or more) spouses at the same time."
bigamous	The adjective "bigamous" means "being married (usually illegally) to two (2) (or more) spouses at the same time."
bigamy	The noun "bigamy" means "(usually illegal) marriage to two (2) (or more) spouses at the same time." See usage note at "polygamy."
bilateral	The adjective "bilateral" means "having two (2) sides."
billiard	The noun and adjective "billiard" means "multiplied by ten to the fifteenth power (10¹⁵ = 1E+15 = 1,000,000,000,000,000)" in the modified Chuquet number naming system.
billion	The noun and adjective "billion" means multiplied by ten to the ninth power (10⁹ = 1E+09 = 1,000,000,000) in the American number naming system, but means multiplied by ten to the twelfth power (10¹² = 1E+12 = 1,000,000,000,000) in the Chuquet number naming system. See also Large Numbers.
billions and billions	The expression "billions and billions" means "an astronomically large number." This expression was popularized by American astronomer Carl Sagan (1934-1996).
bimillenary	1. The noun and adjective "bimillenary" means "a group of two thousand (2000)."
	2. The noun and adjective "bimillenary" means "a period of two thousand (2000) years."
	3. The noun and adjective "bimillenary" means "a two thousand (2000) year anniversary."
	4. The adjective and noun "bimillenary" means "two thousandth (2000th) in rank or order."
bimillennial	1. The adjective and noun "bimillennial" means "recurring every two thousand (2000) years."
	2. The adjective and noun "bimillennial" means "lasting two thousand (2000) years."
	3. The noun and adjective "bimillennial" means "a two thousand (2000) year anniversary."
bimillennium	The noun and adjective "bimillennium" means "a period of two thousand (2000) years."
binal	The adjective "binal" means "based on the number two (2)." See usage note at "binary." See also "base two", Integer Powers of 2, Base Number Systems, Base Number Notation.
binary	The adjective "binary" means "having two (2) parts." See also "base two", Integer Powers of 2, Base Number Systems, Base Number Notation. Usage: A numeral system based on the number two (2) is properly called "binal." The more common term "binary" is also appropriate since a binal digit has two (2) possible binary states: zero (0) or one (1), FALSE or TRUE, low or high, etc.
biped	The noun "biped" means "an animal with two (2) feet."
bipedal	The adjective "bipedal" means "having two (2) feet."
bis-	The prefix "bis-" means "two (2)." See also Numeric Prefixes Used In Chemistry.
bisect	The verb "bisect" means "to divide into two (2) usually equal parts.
bit	1. In archaic American use, the noun "bit" means "one eighth of a dollar ($0.125)."
bit	2. In computer terminology, the noun "bit" means "a single (1) binary unit having two (2) possible states." "Bit" is a contraction of "binary digit."
biyearly	1. The adjective "biyearly" means "recurring every two (2) years."
biyearly	2. The adjective "biyearly" can also mean "recurring twice (2) per year."
both	The plural pronoun and adjective "both" means "two (2) of two (2)." See also "all."
byte	In computer terminology, the noun "byte" means "a set of eight (8) binary units having two to the eighth power (2⁸ = 256) possible states. A byte can be used to represent a single alphanumeric character. A byte is equal to eight (8) bits, four (4) crumbs, or two (2) nibbles.
c-	The traditional metric prefix symbol c- (metric prefix: "centi-" ) denotes a multiple of one one-hundredth (1/100 = 0.010).
cardinal number	A cardinal number is a nonnegative integer, e.g., 0, 1, 2, 3, 4, 5, 6, 7, etc. See also Number Names and "Cardinal Number."
Catalan's Constant	"Catalan's Constant" is a real number approximately 0.915 965 594 177. See also "Catalan's Constant" and "Catalan's Constant."
cent	The noun "cent" (symbol: ¢ ) means "divided by one hundred (1/100 = 0.010)." In currency, a "cent" is "one one-hundredth of a dollar ($0.01), euro (€0.01), or other monetary unit." Usage: The plural of "cent" is normally "cents," but the preferred plural of the euro "cent" is "cent."
centenarian	The noun and adjective "centenarian" means "one hundred (100) years of age or more."
centenary	1. The noun and adjective "centenary" means "a group of one hundred (100)."
	2. The noun and adjective "centenary" means "a period of one hundred (100) years."
	3. The noun and adjective "centenary" means "a one hundred (100) year anniversary."
	4. The adjective and noun "centenary" means "one hundredth (100th) in rank or order."
centennial	1. The adjective and noun "centennial" means "recurring every one hundred (100) years."
	2. The adjective and noun "centennial" means "lasting one hundred (100) years."
	3. The noun and adjective "centennial" means "a one hundred (100) year anniversary."
centennium	The noun and adjective "centennium" means "a period of one hundred (100) years."
centesimal	The adjective "centesimal" means "based on the number one hundred (100)."
centi-	1. The numeric prefix "centi-" means "one hundred (100)." This prefix is derived from the Latin cardinal number "centum (C)."
centi-	2. The traditional metric prefix "centi-" (prefix symbol: c- ) denotes a multiple of one one-hundredth (1/100 = 0.010).
centigrade	The adjective "centigrade" means "having one hundred (100) steps or intervals." The "Celsius temperature scale" was previously known as the "centigrade temperature scale."
centillion	The noun and adjective "centillion" means multiplied by 10³⁰³ in the American number naming system, but means multiplied by 10⁶⁰⁰ in the Chuquet number naming system. See also Large Numbers.
centioctogesimal	The adjective "centioctogesimal" means "based on the number one hundred eighty (180)." See also Base Number Systems.
centipede	The noun "centipede" literally means "having one hundred (100) feet." A "centipede" is "an insect of the class Chilopoda."
centivigesimal	The adjective "centivigesimal" means "based on the number one hundred twenty (120)." See also Base Number Systems.
centurion	The noun "centurion" literally means "one who commands one hundred (100)." A "centurion" was "a Roman officer commanding a century, an infantry unit of about one hundred (100) soldiers."
century	The noun "century" means "one hundred (100)." Most commonly, "century" means "one hundred (100) years." Usage: The Christian Era began with the year 1 A.D., thus the Twenty-First (21^st) Century includes the years 2001 through 2100. In contrast, the Twenty-One Hundreds (2100's) include the years 2100 through 2199.
chiliad	The noun "chiliad" means "a group of one thousand (1,000)" or "one thousand (1,000) years."
chiliagon	The noun "chiliagon" means "a plane figure with one thousand (1,000) sides."
chiliahedron	The noun "chiliahedron" means "a solid figure with one thousand (1,000) faces."
Chuquet System	The "Chuquet number naming system" or "Chuquet System" was devised by French physician and mathematician Nicolas Chuquet (1445-1488), and it is still widely used today. The "Chuquet System" uses a Latin-based numeric prefix to denote an integer power of one million (1,000,000 = 10⁶ = 1E+06), thus: "(prefix)illion" = 1,000,000^(prefix) = 10^6×(prefix) Example: In the "Chuquet System," one billion = 10^6×2 = 10¹² = 1E+12 = 1,000,000,000,000. See also Number Naming Systems.
cinque	The noun "cinque" means "five (5)."
cipher	The noun "cipher" means "zero (0)."
complex number	A complex number is a number that can be represented as an ordered pair consisting of a real number and an imaginary number. A complex number may be expressed as a+b·i, where a and b are real numbers and i is the imaginary unit. The complex number can also be represented as a plane vector r·e^i·θ, where r = (a²+b²)^½, θ = tan^-1(b/a), and i is the imaginary unit. See also "Complex Number."
compound quantity	A compound quantity is a quantity expressed in two or more different but related units of measure, such as dollars and cents or hours, minutes, and seconds. Usage: Currency with a decimal subunit is usually represented as a decimal number, e.g., $139.64 CAD, $1,060.00 MXN, £62.39 GBP, €89.53 EUR. Dates in year, month, and day number may following one of several date formats: 2000-12-31 (ISO 8601), 31/12/2000 (d/m/yyyy), 31/12/00 (d/m/yy), 31/12 (d/m), 12/31/2000 (m/d/yyyy), 12/31/00 (m/d/y), and 12/31 (m/d). Time in hours, minutes, and seconds may following one of several time formats: 19:30:00 (ISO 8601), 19:30 (hh:mm), 19.30 (hh.mm), 19h30 (hh"h"mm), 1930 (hhmm), 7:30 p.m. (h:mm a.m./p.m.), 12:39.36 (m:ss.ss). Angles in degrees, minutes, and seconds are usually followed by their suffix symbols, e.g., 39° 50′ 08″ N.
count	1. The verb "count" means "to enumerate by assigning sequential integers."
	2. The verb "count" means "to tally by counting."
	3. The noun and adjective "count" means "the act of counting."
	4. The noun and adjective "count" means "the total number of objects in a set."
countless	The adjective "countless" means "a very large number of individuals or discrete objects."
couple	The noun and adjective "couple" means "two (2)." Usage: When describing discrete objects, "couple" always means "exactly two (2)," as in "a couple birds." When describing continuous quantities, "couple" usually means "approximately two (2)," as in "a couple hours."
couple-three	The slang expression "couple-three" means "at least two (2) and at most three (3)."
crore	The adjective and noun "crore" means "one hundred lakh or ten million (10,000,000 usually punctuated 1,00,00,000 in India.)"
crumb	In computer terminology, the noun "crumb" means "a pair (2) of binary units having two to the second power (2² = 4) possible states. A crumb is equal to two (2) bits or half (1/2) a nibble.
d-	The traditional metric prefix symbol d- (metric prefix: "deci-" ) denotes a multiple of one tenth (1/10 = 0.100).
da-	The traditional metric compound prefix symbol da- (metric prefix: "deka-" ) denotes a multiple of ten (10).
dB	The symbol "dB" represents a logarithmic power measurement in "decibels."
dea-	The nonstandard prefix "dea-" denotes a multiple of ten to the thirtieth power (10³⁰ = 1E+30 = 1,000,000,000,000,000,000,000,000,000,000).
deca-	The prefix "deca-" means "ten (10)." See also "deka-," Prefixes & Words Based On Greek Number Names, and Numeric Prefixes Used In Chemistry.
decad	The noun and adjective "decad" means "a group of ten (10) members." See also Prefixes & Words Based On Greek Number Names.
decade	The noun "decade" means "ten (10)" or "ten (10) years." Usage: The Christian Era began with the year 1 A.D., thus the Two Hundred First (201^st) Decade includes the years 2001 through 2010. In contrast, the Two Thousand Tens (2010's) include the years 2010 through 2019. See also Prefixes & Words Based On Greek Number Names.
decagon	The noun and adjective "decagon" means "a plain figure with ten (10) straight sides." See also Prefixes & Words Based On Greek Number Names.
decagram	1. The noun and adjective "decagram" means "an interconnected star figure with ten (10) points formed by stellating a decagon." See also Prefixes & Words Based On Greek Number Names.
decagram	2. The noun "decagram" means "a word or character sequence consisting of ten (10) characters."
decahedron	The noun and adjective "decahedron" means "a solid figure with ten (10) planar faces." See also Prefixes & Words Based On Greek Number Names.
decalogue	The noun "decalogue" means "ten (10) rules." Capitalized, "Decalogue" means "the Ten Commandments." More generally, "decalogue" means "a basic set of binding rules." See also Prefixes & Words Based On Greek Number Names.
decameter	The noun "decameter" means "a verse consisting of ten (10) metrical feet."
decangle	The noun "decangle" means "a plane figure with ten (10) vertices."
decathlon	The noun "decathlon" means "an athletic competition consisting of ten (10) separate events."
December	The month name "December" literally means "the tenth (10^th) month." The Roman year began on the first (1^st) day of March.
decemmillenary	1. The noun and adjective "decemmillenary" means "a group of ten thousand (10000)."
	2. The noun and adjective "decemmillenary" means "a period of ten thousand (10000) years."
	3. The noun and adjective "decemmillenary" means "a ten thousand (10000) year anniversary."
	4. The adjective and noun "decemmillenary" means "ten thousandth (10,000th) in rank or order."
decemmillennial	1. The adjective and noun "decemmillennial" means "recurring every ten thousand (10000) years."
	2. The adjective and noun "decemmillennial" means "lasting ten thousand (10000) years."
	3. The noun and adjective "decemmillennial" means "a ten thousand (10000) year anniversary."
decemmillennium	The noun and adjective "decemmillennium" means "a period of ten thousand (10000) years."
decemmillesimal	The adjective "decemmillesimal" means "based on the number ten thousand (10,000)." See also Base Number Systems.
decemvir	The noun "decemvir" means "one of ten (10) ruling men."
decemvirate	The noun "decemvirate" means "a ruling body of ten (10) men."
decennary	The noun and adjective "decennary" means "a group of ten (10) or a period of ten (10) years."
decennial	1. The adjective and noun "decennial" means "recurring every ten (10) years."
	2. The adjective and noun "decennial" means "lasting ten (10) years."
	3. The noun and adjective "decennial" means "a ten (10) year anniversary."
decennium	The noun and adjective "decennium" means "a period of ten (10) years."
decennoval	The adjective "decennoval" means "based on the number nineteen (19)."
deci-	1. The numeric prefix "deci-" means "ten (10)." This prefix is derived from the Latin cardinal number "decem (X)."
deci-	2. The traditional metric prefix "deci-" (prefix symbol: d- ) denotes a multiple of one tenth (1/10 = 0.100).
decibel	1. The noun and adjective "decibel" (symbol: dB ) is a logarithmic comparison of power levels equal to "a ratio of ten to the one-tenth power (10^0.1)" or approximately 1.258 925 411 794. Ten (10) decibels equal one (1) bel or a power ratio of ten (10), and twenty (20) decibels equal two (2) bels or a power ratio of one hundred (100).
decibel	2. The noun and adjective "decibel" (symbol: dB ) is a logarithmic measure of sound power density relative to a power density of "ten to the negative twelfth power (10^-12 = 1E-12 = 0.000 000 000 000) watts per square meter (W/m²) = 1 picowatt per square meter (pW/m²)." Ten (10) decibels are a sound level of 10 pW/m², and twenty (20) decibels are a sound level of 100 pW/m².
decile	The noun "decile" means "a frequency distribution divided into ten (10) equal parts."
decillion	The noun and adjective "decillion" means multiplied by 10³³ in the American number naming system, but means multiplied by 10⁶⁰ in the Chuquet number naming system. See also Large Numbers.
decimal	The adjective "decimal" means "based on the number ten (10)." See also base ten, Base Number Systems, and Base Number Notation.
decimal format	The compound noun and adjective "decimal format" means "the base ten (base_10) number notation system." See also Decimal Number Names.
decimal fraction	The compound noun and adjective "decimal fraction" means "a fraction expressed in decimal format." See also Decimal Fraction Names.
decimal number	The compound noun and adjective "decimal number" means "a real number expressed in decimal format." See also Decimal Number Names.
decimal point	The compound noun and adjective "decimal point" means "the punctuation mark (either a period (.) or a comma(,)) placed to the right of the units (1s) digit of a real number in standard decimal format." See also Decimal Number Names.
decimate	The verb "decimate" literally means "to kill one out of ten (1/10 = 0.100)." More generally, "decimate" means "to destroy a substantial portion." Usage: "Decimate" is often erroneously used to mean "to exterminate" or "to destroy completely." The common expression "completely decimate" is both illogical and confusing. Origin: Roman military tacticians reasoned that a military unit could continue to fight effectively if less than 10% of its members were killed. A unit that suffered more than one in ten killed usually had to reorganize before continuing a campaign. Generals of the Roman Imperial Army later used this rule of thumb to punish cowardly or disobedient legions. The members of the unit to be punished by decimation were lined up unarmed in a single file between two fully armed legions of loyal soldiers. The soldiers were counted in order from one to ten, and each unlucky tenth soldier was executed on the spot. The survivors of this ruthless punishment were returned to duty to face death another day.
decimation	The noun "decimation" literally means "the killing of one out of ten (1/10 = 0.100)." More generally, "decimation" means "the destruction of a substantial portion." See also "decimate."
dectet	The noun "dectet" means "a group of ten (10) members."
decuple	The verb, adjective, adverb, and noun "decuple" means "multiply by ten (10)."
decurion	The noun "decurion" literally means "one who commands ten (10)." A "decurion" was "a Roman officer commanding a cavalry unit of about ten (10) soldiers."
deep six	The noun and verb "deep six" means "disposal, especially by throwing overboard." A minimum water depth of six (6) fathoms (approximately 11 meters) was once considered adequate for disposal of rubbish at sea.
degree	In angular measurement, the noun and adjective "degree" (suffix symbol: -° {degree symbol} ) means "one three-hundred-sixtieth (1/360) of a circle."
-°	The suffix symbol -° {degree symbol} denotes an angular measurement in degrees. One degree is equal to one three-hundred-sixtieth (1/360) of a circle. The degree symbol is also used as part of the compound symbols that represent units of relative temperature, e.g., -°C and -°F.
deka-	The traditional metric prefix "deka-" (compound prefix symbol: da- ) denotes a multiple of ten (10). See also "deca-."
demi-	The Latin-based numeric prefix "demi-" means "one half (1/2)."
denary	1. The adjective and noun "denary" means "tenth (10^th) in order or importance."
denary	2. The adjective "denary" means "having ten (10) parts."
deuce	The noun "deuce" means "two (2)." In parlor games, "deuce" means "a playing card, die, or domino that represents the number two or a throw of dice that totals two." In tennis, "deuce" means "a tie that requires two successive points or games to win."
di-	The prefix "di-" means "two (2)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
dicker	The noun "dicker" means "ten (10)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
dicta-	The prefix "dicta-" means "two hundred (200)." See also Numeric Prefixes Used In Chemistry.
digit	1. The noun and adjective "digit" means "a single symbol used to represent a number." See also "numeral."
	2. The noun and adjective "digit" means "the position occupied by a digit in a positional number notation system."
	3. The adjective "digit" means "the total number of digits in a number."
diheptaconta-	The prefix "diheptaconta-" means "seventy-two (72)."
dihexaconta-	The prefix "dihexaconta-" means "sixty-two (62)."
diicosa-	The prefix "diicosa-" means "twenty-two (22)."
dilia-	The prefix "dilia-" means "two thousand (2000)." See also Numeric Prefixes Used In Chemistry.
dimeric	The adjective "dimeric" means "composed of two (2) parts or divisions."
dimerous	The adjective "dimerous" means "consisting of two (2) parts or segments."
dimeter	The noun "dimeter" means "a verse consisting of either two (2) metrical feet or two (2) dipodies."
dinonaconta-	The prefix "dinonaconta-" means "ninety-two (92)."
dioctaconta-	The prefix "dioctaconta-" means "eighty-two (82)."
dipentaconta-	The Gprefix "dipentaconta-" means "fifty-two (52)."
dipody	The noun "dipody" means "a prosodic unit consisting of two (2) feet."
ditetraconta-	The prefix "ditetraconta-" means "forty-two (42)."
ditriaconta-	The prefix "ditriaconta-" means "thirty-two (32)."
dodeca-	The prefix "dodeca-" means "twelve (12)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
dodecad	The noun and adjective "dodecad" means "a group of twelve (12) members." See also Prefixes & Words Based On Greek Number Names.
dodecagon	The noun and adjective "dodecagon" means "a plain figure with twelve (12) straight sides." See also Prefixes & Words Based On Greek Number Names.
dodecagram	1. The noun and adjective "dodecagram" means "an interconnected star figure with twelve (12) points formed by stellating a dodecagon." See also Prefixes & Words Based On Greek Number Names.
dodecagram	2. The noun "dodecagram" means "a word or character sequence consisting of twelve (12) characters."
dodecahedron	The noun and adjective "dodecahedron" means "a solid figure with twelve (12) planar faces." See also Prefixes & Words Based On Greek Number Names.
dodecillion	The noun and adjective "dodecillion" is an alternate form of "duodecillion." See also Prefixes & Words Based On Greek Number Names.
dodrancentennial	1. The adjective and noun "dodrancentennial" means "recurring every seventy-five (75) years."
	2. The adjective and noun "dodrancentennial" means "lasting seventy-five (75) years."
	3. The noun and adjective "dodrancentennial" means "a seventy-five (75) year anniversary."
dodranmillenary	1. The noun and adjective "dodranmillenary" means "a group of seven hundred fifty (750)."
	2. The noun and adjective "dodranmillenary" means "a period of seven hundred fifty (750) years."
	3. The noun and adjective "dodranmillenary" means "a seven hundred fifty (750) year anniversary."
	4. The adjective and noun "dodranmillenary" means "seven hundred fiftieth (750th) in rank or order."
dodranmillennial	1. The adjective and noun "dodranmillennial" means "recurring every seven hundred fifty (750) years."
	2. The adjective and noun "dodranmillennial" means "lasting seven hundred fifty (750) years."
	3. The noun and adjective "dodranmillennial" means "a seven hundred fifty (750) year anniversary."
dodranmillennium	The noun and adjective "dodranmillennium" means "a period of seven hundred fifty (750) years."
doheptaconta-	The prefix "doheptaconta-" means "seventy-two (72)." See also Numeric Prefixes Used In Chemistry.
dohexaconta-	The prefix "dohexaconta-" means "sixty-two (62)." See also Numeric Prefixes Used In Chemistry.
doicosa-	The prefix "doicosa-" means "twenty-two (22)." See also Numeric Prefixes Used In Chemistry.
dononaconta-	The prefix "dononaconta-" means "ninety-two (92)." See also Numeric Prefixes Used In Chemistry.
dononagintillion	The noun and adjective "dononagintillion" is an alternate form of "duononagintillion."
dooctaconta-	The prefix "dooctaconta-" means "eighty-two (82)." See also Numeric Prefixes Used In Chemistry.
dooctogintillion	The noun and adjective "dooctogintillion" is an alternate form of "duooctogintillion."
dopentaconta-	The prefix "dopentaconta-" means "fifty-two (52)." See also Numeric Prefixes Used In Chemistry.
doquadragintillion	The noun and adjective "doquadragintillion" is an alternate form of "duoquadragintillion."
doquinquagintillion	The noun and adjective "doquinquagintillion" is an alternate form of "duoquinquagintillion."
doseptuagintillion	The noun and adjective "doseptuagintillion" is an alternate form of "duoseptuagintillion."
dosexagintillion	The noun and adjective "dosexagintillion" is an alternate form of "duosexagintillion."
dotetraconta-	The prefix "dotetraconta-" means "forty-two (42)." See also Numeric Prefixes Used In Chemistry.
dotriaconta-	The prefix "dotriaconta-" means "thirty-two (32)." See also Numeric Prefixes Used In Chemistry.
dotrigintillion	The noun and adjective "dotrigintillion" is an alternate form of "duotrigintillion."
double	The verb, adjective, adverb, and noun "double" means "multiply by two (2)."
double agent	The compound noun "double agent" means "a person who serves as an agent of one government while pretending to be the agent of another, often adversarial, government." See also "duplicitous."
double cross	The compound verb and noun "double cross" means "to betray an ally or friend." See also "duplicitous."
-″	1. The suffix symbol -″ {double prime} denotes a linear measurement in inches. One inch is equal to 0.025 400 meter.
-″	2. The suffix symbol -″ {double prime} denotes an angular measurement in seconds. One second is equal to one three-thousand-six-hundredth (1/3,600) of a degree (suffix symbol: -° {degree symbol} ) or one one-million-two-hundred-ninety-six-thousandth (1/1,296,000) of a circle.
double-entendre	The compound noun "double-entendre" means "a word or phrase having two (2) or more meanings, especially when a meaning is risqué."
doubleness	The noun "doubleness" means "the state of being two (2)."
dovigintillion	The noun and adjective "dovigintillion" is an alternate spelling of "duovigintillion."
dozen	The noun and adjective "dozen" means "twelve (12)."
dual	The adjective "dual" means "having two (2) aspects or components."
dual axle	The compound noun and adjective "dual axle" means "a truck axle with two (2) wheels mounted on both (2) sides for a total of four (4) wheels."
dual tandem	The compound noun and adjective "dual tandem" means "a pair (2) of dual truck axles mounted in tandem for a total of eight (8) wheels." See also "tandem dual."
duality	The noun "duality" means "the state of having two (2) aspects."
duet	The noun "duet" means "a group of two (2) members."
duodecennary	The noun and adjective "duodecennary" means "a group of twelve (12) or a period of twelve (12) years."
duodecennial	1. The adjective and noun "duodecennial" means "recurring every twelve (12) years."
	2. The adjective and noun "duodecennial" means "lasting twelve (12) years."
	3. The noun and adjective "duodecennial" means "a twelve (12) year anniversary."
duodecennium	The noun and adjective "duodecennium" means "a period of twelve (12) years."
duodecentenary	1. The noun and adjective "duodecentenary" means "a group of one thousand two hundred (1200)."
	2. The noun and adjective "duodecentenary" means "a period of one thousand two hundred (1200) years."
	3. The noun and adjective "duodecentenary" means "a one thousand two hundred (1200) year anniversary."
	4. The adjective and noun "duodecentenary" means "one thousand two hundredth (1200th) in rank or order."
duodecentennial	1. The adjective and noun "duodecentennial" means "recurring every one thousand two hundred (1200) years."
	2. The adjective and noun "duodecentennial" means "lasting one thousand two hundred (1200) years."
	3. The noun and adjective "duodecentennial" means "a one thousand two hundred (1200) year anniversary."
duodecentennium	The noun and adjective "duodecentennium" means "a period of one thousand two hundred (1200) years."
duodeci-	The numeric prefix "duodeci-" means "twelve (12)." This prefix is derived from the Latin cardinal number "duodecim (XII)."
duodecillion	The noun and adjective "duodecillion" means multiplied by 10³⁹ in the American number naming system, but means multiplied by 10⁷² in the Chuquet number naming system. See also Large Numbers.
duodecimal	The adjective "duodecimal" means "based on the number twelve (12)." See also "base twelve" and Base Number Notation.
duodecimo	The noun "duodecimo (12mo)" means "a book with leaves printed on one twelfth (1/12) of the printer sheet." See also "twelvemo."
duodecuple	The verb, adjective, adverb, and noun "duodecuple" means "multiply by twelve (12)."
duodenary	1. The adjective and noun "duodenary" means "twelfth (12^th) in order or importance."
duodenary	2. The adjective "duodenary" means "having twelve (12) parts."
duononaginta-	The numeric prefix "duononaginta-" means "ninety-two (92)." This prefix is derived from the Latin cardinal number "duo et nonaginta (LXXXXII)."
duononagintennary	The noun and adjective "duononagintennary" means "a group of ninety-two (92) or a period of ninety-two (92) years."
duononagintennial	1. The adjective and noun "duononagintennial" means "recurring every ninety-two (92) years."
	2. The adjective and noun "duononagintennial" means "lasting ninety-two (92) years."
	3. The noun and adjective "duononagintennial" means "a ninety-two (92) year anniversary."
duononagintennium	The noun and adjective "duononagintennium" means "a period of ninety-two (92) years."
duononagintillion	The noun and adjective "duononagintillion" means multiplied by 10²⁷⁹ in the American number naming system, but means multiplied by 10⁵⁵² in the Chuquet number naming system. See also Large Numbers.
duooctoginta-	The numeric prefix "duooctoginta-" means "eighty-two (82)." This prefix is derived from the Latin cardinal number "duo et octoginta (LXXXII)."
duooctogintennary	The noun and adjective "duooctogintennary" means "a group of eighty-two (82) or a period of eighty-two (82) years."
duooctogintennial	1. The adjective and noun "duooctogintennial" means "recurring every eighty-two (82) years."
	2. The adjective and noun "duooctogintennial" means "lasting eighty-two (82) years."
	3. The noun and adjective "duooctogintennial" means "an eighty-two (82) year anniversary."
duooctogintennium	The noun and adjective "duooctogintennium" means "a period of eighty-two (82) years."
duooctogintillion	The noun and adjective "duooctogintillion" means multiplied by 10²⁴⁹ in the American number naming system, but means multiplied by 10⁴⁹² in the Chuquet number naming system. See also Large Numbers.
duoquadraginta-	The numeric prefix "duoquadraginta-" means "forty-two (42)." This prefix is derived from the Latin cardinal number "duo et quadraginta (XXXXII)."
duoquadragintennary	The noun and adjective "duoquadragintennary" means "a group of forty-two (42) or a period of forty-two (42) years."
duoquadragintennial	1. The adjective and noun "duoquadragintennial" means "recurring every forty-two (42) years."
	2. The adjective and noun "duoquadragintennial" means "lasting forty-two (42) years."
	3. The noun and adjective "duoquadragintennial" means "a forty-two (42) year anniversary."
duoquadragintennium	The noun and adjective "duoquadragintennium" means "a period of forty-two (42) years."
duoquadragintillion	The noun and adjective "duoquadragintillion" means multiplied by 10¹²⁹ in the American number naming system, but means multiplied by 10²⁵² in the Chuquet number naming system. See also Large Numbers.
duoquinquaginta-	The numeric prefix "duoquinquaginta-" means "fifty-two (52)." This prefix is derived from the Latin cardinal number "duo et quinquaginta (LII)."
duoquinquagintennary	The noun and adjective "duoquinquagintennary" means "a group of fifty-two (52) or a period of fifty-two (52) years."
duoquinquagintennial	1. The adjective and noun "duoquinquagintennial" means "recurring every fifty-two (52) years."
	2. The adjective and noun "duoquinquagintennial" means "lasting fifty-two (52) years."
	3. The noun and adjective "duoquinquagintennial" means "a fifty-two (52) year anniversary."
duoquinquagintennium	The noun and adjective "duoquinquagintennium" means "a period of fifty-two (52) years."
duoquinquagintillion	The noun and adjective "duoquinquagintillion" means multiplied by 10¹⁵⁹ in the American number naming system, but means multiplied by 10³¹² in the Chuquet number naming system. See also Large Numbers.
duoseptuaginta-	The numeric prefix "duoseptuaginta-" means "seventy-two (72)." This prefix is derived from the Latin cardinal number "duo et septuaginta (LXXII)."
duoseptuagintennary	The noun and adjective "duoseptuagintennary" means "a group of seventy-two (72) or a period of seventy-two (72) years."
duoseptuagintennial	1. The adjective and noun "duoseptuagintennial" means "recurring every seventy-two (72) years."
	2. The adjective and noun "duoseptuagintennial" means "lasting seventy-two (72) years."
	3. The noun and adjective "duoseptuagintennial" means "a seventy-two (72) year anniversary."
duoseptuagintennium	The noun and adjective "duoseptuagintennium" means "a period of seventy-two (72) years."
duoseptuagintillion	The noun and adjective "duoseptuagintillion" means multiplied by 10²¹⁹ in the American number naming system, but means multiplied by 10⁴³² in the Chuquet number naming system. See also Large Numbers.
duosexaginta-	The numeric prefix "duosexaginta-" means "sixty-two (62)." This prefix is derived from the Latin cardinal number "duo et sexaginta (LXII)."
duosexagintennary	The noun and adjective "duosexagintennary" means "a group of sixty-two (62) or a period of sixty-two (62) years."
duosexagintennial	1. The adjective and noun "duosexagintennial" means "recurring every sixty-two (62) years."
	2. The adjective and noun "duosexagintennial" means "lasting sixty-two (62) years."
	3. The noun and adjective "duosexagintennial" means "a sixty-two (62) year anniversary."
duosexagintennium	The noun and adjective "duosexagintennium" means "a period of sixty-two (62) years."
duosexagintillion	The noun and adjective "duosexagintillion" means multiplied by 10¹⁸⁹ in the American number naming system, but means multiplied by 10³⁷² in the Chuquet number naming system. See also Large Numbers.
duotrigesimal	The adjective "duotrigesimal" means "based on the number thirty-two (32)." See also Base Number Notation.
duotriginta-	The numeric prefix "duotriginta-" means "thirty-two (32)." This prefix is derived from the Latin cardinal number "duo et triginta (XXXII)."
duotrigintacentenary	1. The noun and adjective "duotrigintacentenary" means "a group of three thousand two hundred (3200)."
	2. The noun and adjective "duotrigintacentenary" means "a period of three thousand two hundred (3200) years."
	3. The noun and adjective "duotrigintacentenary" means "a three thousand two hundred (3200) year anniversary."
	4. The adjective and noun "duotrigintacentenary" means "three thousand two hundredth (3200th) in rank or order."
duotrigintacentennial	1. The adjective and noun "duotrigintacentennial" means "recurring every three thousand two hundred (3200) years."
	2. The adjective and noun "duotrigintacentennial" means "lasting three thousand two hundred (3200) years."
	3. The noun and adjective "duotrigintacentennial" means "a three thousand two hundred (3200) year anniversary."
duotrigintacentennium	The noun and adjective "duotrigintacentennium" means "a period of three thousand two hundred (3200) years."
duotrigintennary	The noun and adjective "duotrigintennary" means "a group of thirty-two (32) or a period of thirty-two (32) years."
duotrigintennial	1. The adjective and noun "duotrigintennial" means "recurring every thirty-two (32) years."
	2. The adjective and noun "duotrigintennial" means "lasting thirty-two (32) years."
	3. The noun and adjective "duotrigintennial" means "a thirty-two (32) year anniversary."
duotrigintennium	The noun and adjective "duotrigintennium" means "a period of thirty-two (32) years."
duotrigintillion	The noun and adjective "duotrigintillion" means multiplied by 10⁹⁹ in the American number naming system, but means multiplied by 10¹⁹² in the Chuquet number naming system. See also Large Numbers.
duovigintennary	The noun and adjective "duovigintennary" means "a group of twenty-two (22) or a period of twenty-two (22) years."
duovigintennial	1. The adjective and noun "duovigintennial" means "recurring every twenty-two (22) years."
	2. The adjective and noun "duovigintennial" means "lasting twenty-two (22) years."
	3. The noun and adjective "duovigintennial" means "a twenty-two (22) year anniversary."
duovigintennium	The noun and adjective "duovigintennium" means "a period of twenty-two (22) years."
duoviginti-	The numeric prefix "duoviginti-" means "twenty-two (22)." This prefix is derived from the Latin cardinal number "duo et viginti (XXII)."
duoviginticentenary	1. The noun and adjective "duoviginticentenary" means "a group of two thousand two hundred (2200)."
	2. The noun and adjective "duoviginticentenary" means "a period of two thousand two hundred (2200) years."
	3. The noun and adjective "duoviginticentenary" means "a two thousand two hundred (2200) year anniversary."
	4. The adjective and noun "duoviginticentenary" means "two thousand two hundredth (2200th) in rank or order."
duoviginticentennial	1. The adjective and noun "duoviginticentennial" means "recurring every two thousand two hundred (2200) years."
	2. The adjective and noun "duoviginticentennial" means "lasting two thousand two hundred (2200) years."
	3. The noun and adjective "duoviginticentennial" means "a two thousand two hundred (2200) year anniversary."
duoviginticentennium	The noun and adjective "duoviginticentennium" means "a period of two thousand two hundred (2200) years."
duovigintillion	The noun and adjective "duovigintillion" means multiplied by 10⁶⁹ in the American number naming system, but means multiplied by 10¹³² in the Chuquet number naming system. See also Large Numbers.
duple	The adjective and noun "duple" means "multiplied by two (2)."
duplex	The noun and adjective "duplex" means "having two (2) parts."
duplicate	1. The noun and adjective "duplicate" means "either of two (2) things exactly alike."
	2. The adjective "duplicate" means "consisting of two (2) identical or corresponding parts or examples."
	3. The noun and adjective "duplicate" means "a second (2^nd or 2^d) instance or copy of something."
	4. The verb "duplicate" means "to make double (2)."
	5. The verb "duplicate" means "to create a second (2^nd or 2^d) instance or copy of an object." Usage: "Duplicate" is often used generically to mean "reproduce", "replicate", or "copy", but properly "duplicate" means the production of only a single (1) copy.
	6. The verb "duplicate" means "to create something equal to the original (1^st) instance."
	7. The verb "duplicate" means "to do something a second (2^nd or 2^d) time."
duplicitous	The adjective and adverb "duplicitous" means "having a contradictory doubleness, especially belying true intentions by deception."
duplicity	The noun "duplicity" means "the state of being two (2) at once." Most commonly, "duplicity" means "a contradictory doubleness, especially belying true intentions by deception."
duumvir	The noun "duumvir" means "one (1) of two (2) ruling men." (In Latin, "duumvir" specifically refers to an adult male.) The plural of "duumvir" is "duumviri."
duumvirate	The noun and adjective "duumvirate" means "a ruling body of two (2) men."
dyad	The noun and adjective "dyad" means "a group of two (2) members." See also Prefixes & Words Based On Greek Number Names.
dyagram	The noun and adjective "dyagram" means "a word or character pair consisting of two (2) characters."
e	The Latin lower case letter "e" represents "Napier's Constant," the base of the natural, hyperbolic, or Naperian logarithms. "Napier's Constant" is a transcendental number approximately 2.718 281 828 459. See also The Natural Logarithmic Base and e. See also Prefixes & Words Based On Greek Number Names.
E-	The metric prefix symbol E- (metric prefix: "exa-" ) denotes a multiple of ten to the eighteenth power (10¹⁸ = 1E+18 = 1,000,000,000,000,000,000) as defined by Le Système International d'Unités (SI).
each	The singular pronoun and adjective "each" means "every single individual of a group."
Ei-	The compound binary prefix symbol Ei- (binary prefix: "exbi-" ) denotes a multiple of two to the sixtieth power (2⁶⁰ = 1,152,921,504,606,846,976) as defined by the International Electrotechnical Commission (IEC). See also "exabinary."
eight	The noun, pronoun, and adjective "eight (8)" is the standard name for "the cardinal number that follows seven (7)." "Eight" equals "two to the third power (2³)." "Eight" corresponds with the ordinal number "eighth (8^th)." See also Number Names, Number Notation Systems, and Integer Factors.
eighteen	The <>noun, pronoun, and adjective </>"eighteen (18)" is the standard name for "the cardinal number that follows seventeen (17)." "Eighteen" corresponds with the ordinal number "eighteenth (18^th)." See also Number Names, Number Notation Systems, and Integer Factors.
eighteenth	1. The adjective, adverb, and noun "eighteenth (18^th)" is the standard name for "the ordinal number that follows seventeenth (17^th)." "Eighteenth" corresponds with the cardinal number "eighteen (18)." See also Number Names.
eighteenth	2. The adjective and noun "eighteenth (1/18)" means "divided by eighteen (18)."
eighteen-wheeler	The compound noun "eighteen-wheeler (18-wheeler)" means "a tractor and trailer combination freight truck with eighteen (18) wheels." Most commonly, a tractor and trailer rig consists of a tractor with two (2) wheels for steering and tandem dual drive axles and a trailer with tandem dual trailing axles mounted near the rear. See also "octodecicycle" and "semi."
eighth	The adjective, adverb, and noun "eighth (8^th)" is the standard name for "the ordinal number that follows seventh (7^th)." "Eighth" corresponds with the cardinal number "eight (8)." See also Number Names.
eighth	2. The adjective and noun "eighth (1/8)" means "divided by eight (8)."
eighties	1. The plural noun and adjective "eighties (80s)" means "an integer multiple of eighty (80)."
eighties	2. The plural noun and adjective "eighties (80's)" means "the range of numbers at least eighty (80) but less than ninety (90)." When referring to dates, "eighties" means "a span of ten years in which the tens (10s) digit of the year number is eight (8)."
eightieth	1. The adjective, adverb, and noun "eightieth (80^th)" is the standard name for "the ordinal number that follows seventy-ninth (79^th)." "Eightieth" corresponds with the cardinal number "eighty (80)." See also Number Names.
eightieth	2. The adjective and noun "eightieth (1/80)" means "divided by eighty (80)."
eighty	The noun, pronoun, and adjective "eighty (80)" is the standard name for "the cardinal number that follows seventy-nine (79)." "Eighty" corresponds with the ordinal number "eightieth (80^th)." See also Number Names, Number Notation Systems, and Integer Factors.
eighty-eight	The noun and adjective "eighty-eight (88)" is the standard name for "the cardinal number that follows eighty-seven (87)." "Eighty-eight" corresponds with the ordinal number "eighty-eighth (88^th)." See also Number Names, Number Notation Systems, and Integer Factors.
eighty-eighth	The compound adjective, adverb, and noun "eighty-eighth (88^th)" is the standard name for "the ordinal number that follows eighty-seventh (87^th)." "Eighty-eighth" corresponds with the cardinal number "eighty-eight (88)." See also Number Names.
eighty-fifth	The compound adjective, adverb, and noun "eighty-fifth (85^th)" is the standard name for "the ordinal number that follows eighty-fourth (84^th)." "Eighty-fifth" corresponds with the cardinal number "eighty-five (85)." See also Number Names.
eighty-first	The compound adjective, adverb, and noun "eighty-first (81^st)" is the standard name for "the ordinal number that follows eightieth (80^th)." "Eighty-first" corresponds with the cardinal number "eighty-one (81)." See also Number Names.
eighty-five	The noun and adjective "eighty-five (85)" is the standard name for "the cardinal number that follows eighty-four (84)." "Eighty-five" corresponds with the ordinal number "eighty-fifth (85^th)." See also Number Names, Number Notation Systems, and Integer Factors.
eighty-four	The noun and adjective "eighty-four (84)" is the standard name for "the cardinal number that follows eighty-three (83)." "Eighty-four" corresponds with the ordinal number "eighty-fourth (84^th)." See also Number Names, Number Notation Systems, and Integer Factors.
eighty-fourth	The compound adjective, adverb, and noun "eighty-fourth (84^th)" is the standard name for "the ordinal number that follows eighty-third (83^rd or 83^d)." "Eighty-fourth" corresponds with the cardinal number "eighty-four (84)." See also Number Names.
eighty-nine	The noun and adjective "eighty-nine (89)" is the standard name for "the cardinal number that follows eighty-eight (88)." "Eighty-nine" corresponds with the ordinal number "eighty-ninth (89^th)." See also Number Names, Number Notation Systems, and Integer Factors.
eighty-ninth	The compound adjective, adverb, and noun "eighty-ninth (89^th)" is the standard name for "the ordinal number that follows eighty-eighth (88^th)." "Eighty-ninth" corresponds with the cardinal number "eighty-nine (89)." See also Number Names.
eighty-one	The noun and adjective "eighty-one (81)" is the standard name for "the cardinal number that follows eighty (80)." "Eighty-one" corresponds with the ordinal number "eighty-first (81^st)." See also Number Names, Number Notation Systems, and Integer Factors.
eighty-second	The compound adjective, adverb, and noun "eighty-second (82^nd or 82^d)" is the standard name for "the ordinal number that follows eighty-first (81^st)." "Eighty-second" corresponds with the cardinal number "eighty-two (82)." See also Number Names.
eighty-seven	The noun and adjective "eighty-seven (87)" is the standard name for "the cardinal number that follows eighty-six (86)." "Eighty-seven" corresponds with the ordinal number "eighty-seventh (87^th)." See also Number Names, Number Notation Systems, and Integer Factors.
eighty-seventh	The compound adjective, adverb, and noun "eighty-seventh (87^th)" is the standard name for "the ordinal number that follows eighty-sixth (86^th)." "Eighty-seventh" corresponds with the cardinal number "eighty-seven (87)." See also Number Names.
eighty-six	The noun and adjective "eighty-six (86)" is the standard name for "the cardinal number that follows eighty-five (85)." "Eighty-six" corresponds with the ordinal number "eighty-sixth (86^th)." See also Number Names, Number Notation Systems, and Integer Factors.
eighty-sixth	The compound adjective, adverb, and noun "eighty-sixth (86^th)" is the standard name for "the ordinal number that follows eighty-fifth (85^th)." "Eighty-sixth" corresponds with the cardinal number "eighty-six (86)." See also Number Names.
eighty-third	The compound adjective, adverb, and noun "eighty-third (83^rd or 83^d)" is the standard name for "the ordinal number that follows eighty-second (82^nd or 82^d)." "Eighty-third" corresponds with the cardinal number "eighty-three (83)." See also Number Names.
eighty-three	The noun and adjective "eighty-three (83)" is the standard name for "the cardinal number that follows eighty-two (82)." "Eighty-three" corresponds with the ordinal number "eighty-third (83^rd or 83^d)." See also Number Names, Number Notation Systems, and Integer Factors.
eighty-two	The noun and adjective "eighty-two (82)" is the standard name for "the cardinal number that follows eighty-one (81)." "Eighty-two" corresponds with the ordinal number "eighty-second (82^nd or 82^d)." See also Number Names, Number Notation Systems, and Integer Factors.
eleven	The noun, pronoun, and adjective "eleven (11)" is the standard name for "the cardinal number that follows ten (10)." "Eleven" corresponds with the ordinal number "eleventh (11^th)." See also Number Names, Number Notation Systems, and Integer Factors.
eleventh	1. The adjective, adverb, and noun "eleventh (11^th)" is the standard name for "the ordinal number that follows tenth (10^th)." "Eleventh" corresponds with the cardinal number "eleven (11)." See also Number Names.
eleventh	2. The compound adjective and noun "eleventh (1/11)" means "divided by eleven (11)."
ennea-	The prefix "ennea-" means "nine (9)." See also Prefixes & Words Based On Greek Number Names.
enneaconta-	The prefix "enneaconta-" means "ninety (90)." See also Prefixes & Words Based On Greek Number Names.
enneacontad	The noun and adjective "enneacontad" means "a group of ninety (90) members." See also Prefixes & Words Based On Greek Number Names.
enneacontadi-	The prefix "enneacontadi-" means "ninety-two (92)." "Enneacontadi-" is an alternate form of the prefix "enneacontakaidi-." See also Prefixes & Words Based On Greek Number Names.
enneacontaennea-	The prefix "enneacontaennea-" means "ninety-nine (99)." "Enneacontaennea-" is an alternate form of the prefix "enneacontakaiennea-."
enneacontagon	The noun and adjective "enneacontagon" means "a plain figure with ninety (90) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneacontagram	1. The noun and adjective "enneacontagram" means "an interconnected star figure with ninety (90) points formed by stellating a enneacontagon." See also Prefixes & Words Based On Greek Number Names.
enneacontahedron	The noun and adjective "enneacontahedron" means "a solid figure with ninety (90) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneacontahena-	The prefix "enneacontahena-" means "ninety-one (91)." "Enneacontahena-" is an alternate form of the prefix "enneacontakaihena-." See also Prefixes & Words Based On Greek Number Names.
enneacontahepta-	The prefix "enneacontahepta-" means "ninety-seven (97)." "Enneacontahepta-" is an alternate form of the prefix "enneacontakaihepta-."
enneacontahexa-	The prefix "enneacontahexa-" means "ninety-six (96)." "Enneacontahexa-" is an alternate form of the prefix "enneacontakaihexa-."
enneacontakaidi-	The prefix "enneacontakaidi-" means "ninety-two (92)." See also Prefixes & Words Based On Greek Number Names.
enneacontakaidigon	The noun and adjective "enneacontakaidigon" means "a plain figure with ninety-two (92) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneacontakaidigram	The noun and adjective "enneacontakaidigram" means "an interconnected star figure with ninety-two (92) points formed by stellating a enneacontakaidigon." See also Prefixes & Words Based On Greek Number Names.
enneacontakaidihedron	The noun and adjective "enneacontakaidihedron" means "a solid figure with ninety-two (92) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneacontakaidyad	The noun and adjective "enneacontakaidyad" means "a group of ninety-two (92) members." See also Prefixes & Words Based On Greek Number Names.
enneacontakaiennea-	The prefix "enneacontakaiennea-" means "ninety-nine (99)." See also Prefixes & Words Based On Greek Number Names.
enneacontakaiennead	The noun and adjective "enneacontakaiennead" means "a group of ninety-nine (99) members." See also Prefixes & Words Based On Greek Number Names.
enneacontakaienneagon	The noun and adjective "enneacontakaienneagon" means "a plain figure with ninety-nine (99) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneacontakaienneagram	The noun and adjective "enneacontakaienneagram" means "an interconnected star figure with ninety-nine (99) points formed by stellating a enneacontakaienneagon." See also Prefixes & Words Based On Greek Number Names.
enneacontakaienneahedron	The noun and adjective "enneacontakaienneahedron" means "a solid figure with ninety-nine (99) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihena-	The prefix "enneacontakaihena-" means "ninety-one (91)." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihenad	The noun and adjective "enneacontakaihenad" means "a group of ninety-one (91) members." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihenagon	The noun and adjective "enneacontakaihenagon" means "a plain figure with ninety-one (91) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihenagram	The noun and adjective "enneacontakaihenagram" means "an interconnected star figure with ninety-one (91) points formed by stellating a enneacontakaihenagon." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihenahedron	The noun and adjective "enneacontakaihenahedron" means "a solid figure with ninety-one (91) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihepta-	The prefix "enneacontakaihepta-" means "ninety-seven (97)." See also Prefixes & Words Based On Greek Number Names.
enneacontakaiheptad	The noun and adjective "enneacontakaiheptad" means "a group of ninety-seven (97) members." See also Prefixes & Words Based On Greek Number Names.
enneacontakaiheptagon	The noun and adjective "enneacontakaiheptagon" means "a plain figure with ninety-seven (97) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneacontakaiheptagram	The noun and adjective "enneacontakaiheptagram" means "an interconnected star figure with ninety-seven (97) points formed by stellating a enneacontakaiheptagon." See also Prefixes & Words Based On Greek Number Names.
enneacontakaiheptahedron	The noun and adjective "enneacontakaiheptahedron" means "a solid figure with ninety-seven (97) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihexa-	The prefix "enneacontakaihexa-" means "ninety-six (96)." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihexad	The noun and adjective "enneacontakaihexad" means "a group of ninety-six (96) members." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihexagon	The noun and adjective "enneacontakaihexagon" means "a plain figure with ninety-six (96) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihexagram	The noun and adjective "enneacontakaihexagram" means "an interconnected star figure with ninety-six (96) points formed by stellating a enneacontakaihexagon." See also Prefixes & Words Based On Greek Number Names.
enneacontakaihexahedron	The noun and adjective "enneacontakaihexahedron" means "a solid figure with ninety-six (96) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneacontakaiocta-	The prefix "enneacontakaiocta-" means "ninety-eight (98)." See also Prefixes & Words Based On Greek Number Names.
enneacontakaioctad	The noun and adjective "enneacontakaioctad" means "a group of ninety-eight (98) members." See also Prefixes & Words Based On Greek Number Names.
enneacontakaioctagon	The noun and adjective "enneacontakaioctagon" means "a plain figure with ninety-eight (98) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneacontakaioctagram	The noun and adjective "enneacontakaioctagram" means "an interconnected star figure with ninety-eight (98) points formed by stellating a enneacontakaioctagon." See also Prefixes & Words Based On Greek Number Names.
enneacontakaioctahedron	The noun and adjective "enneacontakaioctahedron" means "a solid figure with ninety-eight (98) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneacontakaipenta-	The prefix "enneacontakaipenta-" means "ninety-five (95)." See also Prefixes & Words Based On Greek Number Names.
enneacontakaipentad	The noun and adjective "enneacontakaipentad" means "a group of ninety-five (95) members." See also Prefixes & Words Based On Greek Number Names.
enneacontakaipentagon	The noun and adjective "enneacontakaipentagon" means "a plain figure with ninety-five (95) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneacontakaipentagram	The noun and adjective "enneacontakaipentagram" means "an interconnected star figure with ninety-five (95) points formed by stellating a enneacontakaipentagon." See also Prefixes & Words Based On Greek Number Names.
enneacontakaipentahedron	The noun and adjective "enneacontakaipentahedron" means "a solid figure with ninety-five (95) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneacontakaitetra-	The prefix "enneacontakaitetra-" means "ninety-four (94)." See also Prefixes & Words Based On Greek Number Names.
enneacontakaitetrad	The noun and adjective "enneacontakaitetrad" means "a group of ninety-four (94) members." See also Prefixes & Words Based On Greek Number Names.
enneacontakaitetragon	The noun and adjective "enneacontakaitetragon" means "a plain figure with ninety-four (94) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneacontakaitetragram	The noun and adjective "enneacontakaitetragram" means "an interconnected star figure with ninety-four (94) points formed by stellating a enneacontakaitetragon." See also Prefixes & Words Based On Greek Number Names.
enneacontakaitetrahedron	The noun and adjective "enneacontakaitetrahedron" means "a solid figure with ninety-four (94) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneacontakaitri-	The prefix "enneacontakaitri-" means "ninety-three (93)." See also Prefixes & Words Based On Greek Number Names.
enneacontakaitriad	The noun and adjective "enneacontakaitriad" means "a group of ninety-three (93) members." See also Prefixes & Words Based On Greek Number Names.
enneacontakaitrigon	The noun and adjective "enneacontakaitrigon" means "a plain figure with ninety-three (93) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneacontakaitrigram	The noun and adjective "enneacontakaitrigram" means "an interconnected star figure with ninety-three (93) points formed by stellating a enneacontakaitrigon." See also Prefixes & Words Based On Greek Number Names.
enneacontakaitrihedron	The noun and adjective "enneacontakaitrihedron" means "a solid figure with ninety-three (93) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneacontaocta-	The prefix "enneacontaocta-" means "ninety-eight (98)." "Enneacontaocta-" is an alternate form of the prefix "enneacontakaiocta-." See also Prefixes & Words Based On Greek Number Names.
enneacontapenta-	The prefix "enneacontapenta-" means "ninety-five (95)." "Enneacontapenta-" is an alternate form of the prefix "enneacontakaipenta-."
enneacontatetra-	The prefix "enneacontatetra-" means "ninety-four (94)." "Enneacontatetra-" is an alternate form of the prefix "enneacontakaitetra-."
enneacontatri-	The prefix "enneacontatri-" means "ninety-three (93)." "Enneacontatri-" is an alternate form of the prefix "enneacontakaitri-."
ennead	The noun and adjective "ennead" means "a group of nine (9) members." See also Prefixes & Words Based On Greek Number Names.
enneadeca-	The prefix "enneadeca-" means "nineteen (19)." "Enneadeca-" is an alternate form of the prefix "enneakaideca-." See also Prefixes & Words Based On Greek Number Names.
enneagon	The noun and adjective "enneagon" means "a plain figure with nine (9) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneagram	1. The noun and adjective "enneagram" means "an interconnected star figure with nine (9) points formed by stellating a enneagon." See also Prefixes & Words Based On Greek Number Names.
enneagram	2. The noun "enneagram" means "a word or character sequence consisting of nine (9) characters."
enneahedron	The noun and adjective "enneahedron" means "a solid figure with nine (9) planar faces." See also Prefixes & Words Based On Greek Number Names.
enneakaideca-	The prefix "enneakaideca-" means "nineteen (19)." See also Prefixes & Words Based On Greek Number Names.
enneakaidecad	The noun and adjective "enneakaidecad" means "a group of nineteen (19) members." See also Prefixes & Words Based On Greek Number Names.
enneakaidecagon	The noun and adjective "enneakaidecagon" means "a plain figure with nineteen (19) straight sides." See also Prefixes & Words Based On Greek Number Names.
enneakaidecagram	The noun and adjective "enneakaidecagram" means "an interconnected star figure with nineteen (19) points formed by stellating a enneakaidecagon." See also Prefixes & Words Based On Greek Number Names.
enneakaidecahedron	The noun and adjective "enneakaidecahedron" means "a solid figure with nineteen (19) planar faces." See also Prefixes & Words Based On Greek Number Names.
enumerate	The verb "enumerate" means "to assign a number to an object." Most commonly "enumerate" means "to count." See also "number." See also Prefixes & Words Based On Greek Number Names.
ephemeral	The adjective and noun "ephemeral" means "lasting only one (1) day." More generally, "ephemeral" means "lasting a comparatively short time."
Euler-Mascheroni Constant	The "Euler-Mascheroni Constant," also known as "Euler's Constant," (symbol: γ {Greek lower case letter gamma} ) is approximately 0.577 215 664 902. Swiss mathematician Leonhard Euler (1707-1783) discovered γ in 1734. Italian priest and mathematician Lorenzo Mascheroni made the first precise calculation of γ in 1790. See also "Euler-Mascheroni Constant, γ."
Euler's Constant	"Euler's Constant," also known as the "Euler-Mascheroni Constant," (symbol: γ {Greek lower case letter gamma} ) is approximately 0.577 215 664 902. Swiss mathematician Leonhard Euler (1707-1783) discovered γ in 1734. Italian priest and mathematician Lorenzo Mascheroni made the first precise calculation of γ in 1790. See also "Euler-Mascheroni Constant, γ."
every	The adjective "every" means "each member of a group without exception."
exa-	The metric prefix "exa-" (prefix symbol: E- ) denotes a multiple of ten to the eighteenth power (10¹⁸ = 1E+18 = 1,000,000,000,000,000,000) as defined by Le Système International d'Unités (SI).
exabinary	The adjective "exabinary" means "two to the sixtieth power (2⁶⁰ = 1,152,921,504,606,846,976)." See also binary prefix "exbi-" and compound binary prefix symbol "Ei-."
exbi-	The binary prefix "exbi-" (prefix symbol: Ei- ) denotes a multiple of two to the sixtieth power (2⁶⁰ = 1,152,921,504,606,846,976) as defined by the International Electrotechnical Commission (IEC). See also "exabinary."
exbin	The adjective and noun "exbin" means "two to the sixtieth power (2⁶⁰ = 1,152,921,504,606,846,976)." See also "exabinary" and "exbi-."
F	The Latin letter "F" is a symbol for the logical value "FALSE".
f-	The metric prefix symbol f- (metric prefix: "femto-" ) denotes a multiple of ten to the negative fifteenth power (10^-15 = 1E-15 = 0.000 000 000 000 001) as defined by Le Système International d'Unités (SI).
FALSE	The adjective, adverb, and noun "FALSE" is a logical value. "FALSE" and "TRUE" are often used as a binary logic pair.
femto-	The metric prefix "femto-" (prefix symbol: f- ) denotes a multiple of ten to the negative fifteenth power (10^-15 = 1E-15 = 0.000 000 000 000 001) as defined by Le Système International d'Unités (SI).
few	The noun and positive adjective "few" means "a relatively small number of individuals or discrete objects." Usage: The adjectives "few/fewer/fewest" are used with count nouns and collection nouns (integers), while the adjectives "little/less/least" are used with mass nouns (non-discrete quantities). Example: "I know my automobile uses less fuel because I make fewer stops to refill."
fewer	The comparative adjective "fewer" means "a smaller number of individuals or discrete objects." See usage note at "few."
fewest	The superlative adjective "fewest" means "the smallest number of individuals or discrete objects." See usage note at "few."
fifteen	The noun, pronoun, and adjective "fifteen (15)" is the standard name for "the cardinal number that follows fourteen (14)." "Fifteen" corresponds with the ordinal number "fifteenth (15^th)." See also Number Names, Number Notation Systems, and Integer Factors.
fifteenth	1. The adjective, adverb, and noun "fifteenth (15^th)" is the standard name for "the ordinal number that follows fourteenth (14^th)." "Fifteenth" corresponds with the cardinal number "fifteen (15)." See also Number Names.
fifteenth	2. The adjective and noun "fifteenth (1/15)" means "divided by fifteen (15)."
fifth	1. The adjective, adverb, and noun "fifth (5^th)" is the standard name for "the ordinal number that follows fourth (4^th)." "Fifth" corresponds with the cardinal number "five (5)." See also Number Names.
	2. The adjective and noun "fifth (1/5)" means "divided by five (5)."
	3. In liquid measurement, the noun and adjective "fifth" means "one fifth (1/5) of a gallon."
fifth cousin	The compound noun "fifth (5th) cousin" means "an individual sharing a common pair of great-great-great-great-grandparents with the referenced individual."
fifth element	The compound noun "fifth (5th) element" means "the fifth (5th) and most important element of the universe." See also "quintessence."
fifth essence	The compound noun "fifth (5th) essence" means "the fifth (5th) and highest essence of an object or being." See also "quintessence."
fifties	1. The plural noun and adjective "fifties (50s)" means "an integer multiple of fifty (50)."
fifties	2. The plural noun and adjective "fifties (50's)" means "the range of numbers at least fifty (50) but less than sixty (60)." When referring to dates, "fifties" means "a span of ten years in which the tens (10s) digit of the year number is five (5)."
fiftieth	1. The adjective, adverb, and noun "fiftieth (50^th)" is the standard name for "the ordinal number that follows forty-ninth (49^th)." "Fiftieth" corresponds with the cardinal number "fifty (50)." See also Number Names.
fiftieth	2. The adjective and noun "fiftieth (1/50)" means "divided by fifty (50)."
fifty	The noun, pronoun, and adjective "fifty (50)" is the standard name for "the cardinal number that follows forty-nine (49)." "Fifty" corresponds with the ordinal number "fiftieth (50^th)." See also Number Names, Number Notation Systems, and Integer Factors.
fifty-eight	The noun and adjective "fifty-eight (58)" is the standard name for "the cardinal number that follows fifty-seven (57)." "Fifty-eight" corresponds with the ordinal number "fifty-eighth (58^th)." See also Number Names, Number Notation Systems, and Integer Factors.
fifty-eighth	The compound adjective, adverb, and noun "fifty-eighth (58^th)" is the standard name for "the ordinal number that follows fifty-seventh (57^th)." "Fifty-eighth" corresponds with the cardinal number "fifty-eight (58)." See also Number Names.
fifty-fifth	The compound adjective, adverb, and noun "fifty-fifth (55^th)" is the standard name for "the ordinal number that follows fifty-fourth (54^th)." "Fifty-fifth" corresponds with the cardinal number "fifty-five (55)." See also Number Names.
fifty-first	The compound adjective, adverb, and noun "fifty-first (51^st)" is the standard name for "the ordinal number that follows fiftieth (50^th)." "Fifty-first" corresponds with the cardinal number "fifty-one (51)." See also Number Names.
fifty-five	The noun and adjective "fifty-five (55)" is the standard name for "the cardinal number that follows fifty-four (54)." "Fifty-five" corresponds with the ordinal number "fifty-fifth (55^th)." See also Number Names, Number Notation Systems, and Integer Factors.
fifty-four	The noun and adjective "fifty-four (54)" is the standard name for "the cardinal number that follows fifty-three (53)." "Fifty-four" corresponds with the ordinal number "fifty-fourth (54^th)." See also Number Names, Number Notation Systems, and Integer Factors.
fifty-fourth	The compound adjective, adverb, and noun "fifty-fourth (54^th)" is the standard name for "the ordinal number that follows fifty-third (53^rd or 53^d)." "Fifty-fourth" corresponds with the cardinal number "fifty-four (54)." See also Number Names.
fifty-nine	The noun and adjective "fifty-nine (59)" is the standard name for "the cardinal number that follows fifty-eight (58)." "Fifty-nine" corresponds with the ordinal number "fifty-ninth (59^th)." See also Number Names, Number Notation Systems, and Integer Factors.
fifty-ninth	The compound adjective, adverb, and noun "fifty-ninth (59^th)" is the standard name for "the ordinal number that follows fifty-eighth (58^th)." "Fifty-ninth" corresponds with the cardinal number "fifty-nine (59)." See also Number Names.
fifty-one	The noun and adjective "fifty-one (51)" is the standard name for "the cardinal number that follows fifty (50)." "Fifty-one" corresponds with the ordinal number "fifty-first (51^st)." See also Number Names, Number Notation Systems, and Integer Factors.
fifty-second	The compound adjective, adverb, and noun "fifty-second (52^nd or 52^d)" is the standard name for "the ordinal number that follows fifty-first (51^st)." "Fifty-second" corresponds with the cardinal number "fifty-two (52)." See also Number Names.
fifty-seven	The noun and adjective "fifty-seven (57)" is the standard name for "the cardinal number that follows fifty-six (56)." "Fifty-seven" corresponds with the ordinal number "fifty-seventh (57^th)." See also Number Names, Number Notation Systems, and Integer Factors.
fifty-seventh	The compound adjective, adverb, and noun "fifty-seventh (57^th)" is the standard name for "the ordinal number that follows fifty-sixth (56^th)." "Fifty-seventh" corresponds with the cardinal number "fifty-seven (57)." See also Number Names.
fifty-six	The noun and adjective "fifty-six (56)" is the standard name for "the cardinal number that follows fifty-five (55)." "Fifty-six" corresponds with the ordinal number "fifty-sixth (56^th)." See also Number Names, Number Notation Systems, and Integer Factors.
fifty-sixth	The compound adjective, adverb, and noun "fifty-sixth (56^th)" is the standard name for "the ordinal number that follows fifty-fifth (55^th)." "Fifty-sixth" corresponds with the cardinal number "fifty-six (56)." See also Number Names.
fifty-something	The compound noun and adjective "fifty-something" means "at least fifty (50) but less than sixty (60)." "Fifty-something" most commonly means "between fifty (50) and sixty (60) years of age." See also "quinquagenarian."
fifty-third	The compound adjective, adverb, and noun "fifty-third (53^rd or 53^d)" is the standard name for "the ordinal number that follows fifty-second (52^nd or 52^d)." "Fifty-third" corresponds with the cardinal number "fifty-three (53)." See also Number Names.
fifty-three	The noun and adjective "fifty-three (53)" is the standard name for "the cardinal number that follows fifty-two (52)." "Fifty-three" corresponds with the ordinal number "fifty-third (53^rd or 53^d)." See also Number Names, Number Notation Systems, and Integer Factors.
fifty-two	The noun and adjective "fifty-two (52)" is the standard name for "the cardinal number that follows fifty-one (51)." "Fifty-two" corresponds with the ordinal number "fifty-second (52^nd or 52^d)." See also Number Names, Number Notation Systems, and Integer Factors.
finite	The adjective "finite" means "a quantity that can be bound by limits." See also Finite.
first	The adjective, adverb, and noun "first (1^st)" is the standard name for "the ordinal number that precedes all other ordinal numbers." "First" corresponds with the cardinal number "one (1)." The word "first" is often used to denote "the earliest event" or "the highest class." See also Number Names.
first aid	The compound noun and adjective "first (1^st) aid" means "emergency medical treatment administered to an injured or sick person before professional medical care is available."
first class	The compound noun, adjective, and adverb "first (1^st) class" means "the best class."
first cousin	The compound noun "first (1^st) cousin" means "an individual sharing a common pair of grandparents with the referenced individual."
first cousin once removed	The compound noun "first (1^st) cousin once (1-time) removed" means "the child of a first cousin"
first cousin thrice removed	The compound noun "first (1^st) cousin thrice (3-times) removed" means "the great-grandchild of a first cousin"
first cousin twice removed	The compound noun "first (1^st) cousin twice (2-times) removed" means "the grandchild of a first cousin"
First Nation	The compound noun and adjective "First (1^st) Nation" means "an aboriginal group or community, especially those officially recognized by the Canadian government."
first person	The compound noun and adjective "first (1^st) person" denotes "the speaker or writer referring to himself or herself."
first string	The noun and adjective "first (1^st) string" means "the group of players designated to start games for a sports team, usually the best player at each position."
First World	The compound noun and adjective "First (1^st) World" means "the wealthest nations of the world, more specifically, those nations whose per capita gross domestic product (GDP) is more than twice the average per capita gross domestic product of all the Earth's population (about $15,800 USD per person per year in 2003.)" See origin note at "Third World."
firstborn	The noun and adjective "firstborn" means "the child born first in a family."
firsthand	The adjective and adverb "firsthand" means "received from the original (1^st) source."
firstling	The noun and adjective "firstling" means "the individual born or created first within a group."
first-rate	The adjective and adverb "first-rate (1^st-rate)" means "the highest quality, rank, or importance."
first stringer	The noun "first-stringer" means "a player on the first string."
five	The noun, pronoun, and adjective "five (5)" is the standard name for "the cardinal number that follows four (4)." "Five" corresponds with the ordinal number "fifth (5^th)." See also Number Names, Number Notation Systems, and Integer Factors.
five-star	The compound adjective "five-star (5-star)" means "of highest quality based upon the one (1) to five (5) star rating system often used to evaluate accomodations, restaurants, customer service, etc."
-fold	The suffix "-fold" means "multiplied by the prefix number." Thus, "twofold (2-fold)" means "doubled" and "threefold (3-fold)" means "tripled."
folio	The noun "folio" means "a book with leaves printed on one half (1/2) of the printer sheet."
forties	1. The plural noun and adjective "forties (40s)" means "an integer multiple of forty (40)."
forties	2. The plural noun and adjective "forties (40's)" means "the range of numbers at least forty (40) but less than fifty (50)." When referring to dates, "forties" means "a span of ten years in which the tens (10s) digit of the year number is four (4)."
fortieth	The adjective, adverb, and noun "fortieth (40^th)" is the standard name for "the ordinal number that follows thirty-ninth (39^th)." "Fortieth" corresponds with the cardinal number "forty (40)." See also Number Names.
fortieth	2. The adjective and noun "fortieth (1/40)" means "divided by forty (40)."
fortnight	The noun "fortnight" means "fourteen (14) days."
fortnightly	The adjective "fortnightly" means "recurring every fourteen (14) days."
forty	The noun, pronoun, and adjective "forty (40)" is the standard name for "the cardinal number that follows thirty-nine (39)." "Forty" corresponds with the ordinal number "fortieth (40^th)." See also Number Names, Number Notation Systems, and Integer Factors.
forty-eight	The noun and adjective "forty-eight (48)" is the standard name for "the cardinal number that follows forty-seven (47)." "Forty-eight" corresponds with the ordinal number "forty-eighth (48^th)." See also Number Names, Number Notation Systems, and Integer Factors.
forty-eighth	1. The compound adjective, adverb, and noun "forty-eighth (48^th)" is the standard name for "the ordinal number that follows forty-seventh (47^th)." "Forty-eighth" corresponds with the cardinal number "forty-eight (48)." See also Number Names.
forty-eighth	2. The compound adjective and noun "forty-eighth (1/48)" means "divided by forty-eight (24)."
forty-fifth	The compound adjective, adverb, and noun "forty-fifth (45^th)" is the standard name for "the ordinal number that follows forty-fourth (44^th)." "Forty-fifth" corresponds with the cardinal number "forty-five (45)." See also Number Names.
forty-first	The compound adjective, adverb, and noun "forty-first (41^st)" is the standard name for "the ordinal number that follows fortieth (40^th)." "Forty-first" corresponds with the cardinal number "forty-one (41)." See also Number Names.
forty-five	The noun and adjective "forty-five (45)" is the standard name for "the cardinal number that follows forty-four (44)." "Forty-five" corresponds with the ordinal number "forty-fifth (45^th)." See also Number Names, Number Notation Systems, and Integer Factors.
forty-four	The noun and adjective "forty-four (44)" is the standard name for "the cardinal number that follows forty-three (43)." "Forty-four" corresponds with the ordinal number "forty-fourth (44^th)." See also Number Names, Number Notation Systems, and Integer Factors.
forty-fourth	The compound adjective, adverb, and noun "forty-fourth (44^th)" is the standard name for "the ordinal number that follows forty-third (43^rd or 43^d)." "Forty-fourth" corresponds with the cardinal number "forty-four (44)." See also Number Names.
forty-nine	The noun and adjective "forty-nine (49)" is the standard name for "the cardinal number that follows forty-eight (48)." "Forty-nine" corresponds with the ordinal number "forty-ninth (49^th)." See also Number Names, Number Notation Systems, and Integer Factors.
forty-ninth	The compound adjective, adverb, and noun "forty-ninth (49^th)" is the standard name for "the ordinal number that follows forty-eighth (48^th)." "Forty-ninth" corresponds with the cardinal number "forty-nine (49)." See also Number Names.
forty-one	The noun and adjective "forty-one (41)" is the standard name for "the cardinal number that follows forty (40)." "Forty-one" corresponds with the ordinal number "forty-first (41^st)." See also Number Names, Number Notation Systems, and Integer Factors.
forty-second	The compound adjective, adverb, and noun "forty-second (42^nd or 42^d)" is the standard name for "the ordinal number that follows forty-first (41^st)." "Forty-second" corresponds with the cardinal number "forty-two (42)." See also Number Names.
forty-seven	The noun and adjective "forty-seven (47)" is the standard name for "the cardinal number that follows forty-six (46)." "Forty-seven" corresponds with the ordinal number "forty-seventh (47^th)." See also Number Names, Number Notation Systems, and Integer Factors.
forty-seventh	The compound adjective, adverb, and noun "forty-seventh (47^th)" is the standard name for "the ordinal number that follows forty-sixth (46^th)." "Forty-seventh" corresponds with the cardinal number "forty-seven (47)." See also Number Names.
forty-six	The noun and adjective "forty-six (46)" is the standard name for "the cardinal number that follows forty-five (45)." "Forty-six" corresponds with the ordinal number "forty-sixth (46^th)." See also Number Names, Number Notation Systems, and Integer Factors.
forty-sixth	The compound adjective, adverb, and noun "forty-sixth (46^th)" is the standard name for "the ordinal number that follows forty-fifth (45^th)." "Forty-sixth" corresponds with the cardinal number "forty-six (46)." See also Number Names.
forty-something	The compound noun and adjective "forty-something" means "at least forty (40) but less than fifty (50)." "Forty-something" most commonly means "between forty (40) and fifty (50) years of age." See also "quadragenarian."
forty-third	The compound adjective, adverb, and noun "forty-third (43^rd or 43^d)" is the standard name for "the ordinal number that follows forty-second (42^nd or 42^d)." "Forty-third" corresponds with the cardinal number "forty-three (43)." See also Number Names.
forty-three	The noun and adjective "forty-three (43)" is the standard name for "the cardinal number that follows forty-two (42)." "Forty-three" corresponds with the ordinal number "forty-third (43^rd or 43^d)." See also Number Names, Number Notation Systems, and Integer Factors.
forty-two	The noun and adjective "forty-two (42)" is the standard name for "the cardinal number that follows forty-one (41)." "Forty-two" corresponds with the ordinal number "forty-second (42^nd or 42^d)." See also Number Names, Number Notation Systems, and Integer Factors. See also the answer to the great question of "life, the universe, and everything."
four	The noun, pronoun, and adjective "four (4)" is the standard name for "the cardinal number that follows three (3)." "Four" equals "two to the second power (2²)." "Four" corresponds with the ordinal number "fourth (4^th)." See also Number Names, Number Notation Systems, and Integer Factors.
fourscore	The noun and adjective "fourscore" means "eighty (80)."
fourscore and ten	The compound noun and adjective "fourscore and ten" means "ninety (90)."
four-star	The compound adjective "four-star (4-star)" means "of highest quality based upon the one (1) to four (4) star rating system often used to evaluate movies, etc."
fourteen	The noun, pronoun, and adjective "fourteen (14)" is the standard name for "the cardinal number that follows thirteen (13)." "Fourteen" corresponds with the ordinal number "fourteenth (14^th)." See also Number Names, Number Notation Systems, and Integer Factors.
fourteenth	The adjective, adverb, and noun "fourteenth (14^th)" is the standard name for "the ordinal number that follows thirteenth (13^th)." "Fourteenth" corresponds with the cardinal number "fourteen (14)." See also Number Names.
fourteenth	2. The adjective and noun "fourteenth (1/14)" means "divided by fourteen (14)."
fourth	1. The adjective, adverb, and noun "fourth (4^th)" is the standard name for "the ordinal number that follows third (3^rd or 3^d)." "Fourth" corresponds with the cardinal number "four (4)." See also Number Names.
fourth	2. The adjective and noun "fourth (1/4)" means "divided by four (4)." See also "quarter."
fourth cousin	The compound noun "fourth (4^th) cousin" means "an individual sharing a common pair of great-great-great-grandparents with the referenced individual."
Fourth World	The compound noun and adjective "Fourth (4^th) World" means "the poorest nations of the world, more specifically, those nations whose per capita gross domestic product (GDP) is less than about one fifth (20%) the average per capita gross domestic product of all the Earth's population (about $1,600 USD per person per year in 2003.)" See origin note at "Third World."
fraction	The noun "fraction" means "a rational number expressed as one integer divided by another integer." See also Fraction.
G-	The metric prefix symbol G- (metric prefix: "giga-" ) denotes a multiple of ten to the ninth power (10⁹ = 1E+09 = 1,000,000,000) as defined by Le Système International d'Unités (SI).
γ	The Greek lower case letter γ {gamma} represents "Euler's Constant," also known as the "Euler-Mascheroni Constant," γ is approximately 0.577 215 664 902. See also 'Euler-Mascheroni Constant, γ.'
Gi-	The compound binary prefix symbol Gi- (binary prefix: "gibi-" ) denotes a multiple of two to the thirtieth power (2³⁰ = 1,073,741,824) as defined by the International Electrotechnical Commission (IEC). See also "gigabinary."
gibi-	The binary prefix "gibi-" (prefix symbol: Gi- ) denotes a multiple of two to the thirtieth power (2³⁰ = 1,073,741,824) as defined by the International Electrotechnical Commission (IEC). See also "gigabinary."
gibin	The adjective and noun "gibin" means "two to the thirtieth power (2³⁰ = 1,073,741,824)." See also "gigabinary" and "gibi-."
giga-	The metric prefix "giga-" (prefix symbol: G- ) denotes a multiple of ten to the ninth power (10⁹ = 1E+09 = 1,000,000,000) as defined by Le Système International d'Unités (SI).
gigabinary	The adjective "gigabinary" means "two to the thirtieth power (2³⁰ = 1,073,741,824)." See also binary prefix "gibi-" and compound binary prefix symbol "Gi-."
Golden Ratio	The "Golden Ratio" (symbol: φ {Greek lower case letter phi} ) is the irrational number that is one greater than its multiplicative inverse, i.e., φ = 1 + 1/φ = (1+5^½)/2 = approximately 1.618 033 988 750. The ancient Egyptians discovered φ, which they honored as their "Sacred Ratio." The ancient Greeks used φ extensively in art and architecture and treasured as their "Golden Ratio." The ancient Egyptians discovered φ, which they honored as their "Sacred Ratio." The ancient Greeks treasured φ as their "Golden Ratio." The ratio φ is used extensively in art and architecture. See also The Golden Mean and Golden Ratio.
googol	The noun "googol" means "ten to the one hundredth power (10¹⁰⁰ = 1E+100 )." The word "googol" was invented by Milton Sirotta, the 9-year-old nephew of mathematician Edward Kasner, who had asked his nephew what he thought such a large number should be called.
googolplex	The noun "googolplex" means "ten to the googol power (10^googol = 1E+(1E+100))."
goose egg	The compound noun "goose egg" is a euphemism for "the digit zero (0)."
grade	In angular measurement, the noun and adjective "grade" means "one four-hundredth (1/400 = 0.002 500) of a circle."
grand gross	The compound noun "grand gross" means "one dozen dozen dozen (1728)."
gross	The noun "gross" means "one dozen dozen (144)."
h-	The traditional metric prefix symbol h- (metric prefix: "hecto-" ) denotes a multiple of one hundred (100).
half	The singular noun and adjective "half (1/2)" means "divided by two (2)." The plural of "half" is "halves." A "half" coin has a value of "one half of a dollar ($0.50)." See also the verb "halve."
half a hundred	The compound noun and adjective "half a hundred" means "fifty (50)."
half century	The compound noun "half century" means "fifty (50) years."
half decade	The compound noun "half decade" means "five (5) years."
half dozen	The compound noun and adjective "half dozen" means "six (6)."
halve	The verb "halve" means "to divide by two (2)." See also the noun and adjective "half/halves."
halves	The plural noun and adjective "halves (1/2)" means "divided by two (2)." The singular of "halves" is "half." See also the verb "halve."
hecatohedron	The noun "hecatohedron" means "a solid figure with one hundred (100) faces."
hecta-	The prefix "hecta-" means "one hundred (100)." See also Numeric Prefixes Used In Chemistry.
hectad	The noun and adjective "hectad" means "a group of one hundred (100) members." See also Prefixes & Words Based On Greek Number Names.
hecto-	The traditional metric prefix "hecto-" (prefix symbol: h- ) denotes a multiple of one hundred (100). See also Prefixes & Words Based On Greek Number Names.
hectogon	The noun and adjective "hectogon" means "a plain figure with one hundred (100) straight sides." See also Prefixes & Words Based On Greek Number Names.
hectogram	The noun and adjective "hectogram" means "an interconnected star figure with one hundred (100) points formed by stellating a hectogon." See also Prefixes & Words Based On Greek Number Names.
hectohedron	The noun and adjective "hectohedron" means "a solid figure with one hundred (100) planar faces." See also Prefixes & Words Based On Greek Number Names.
hemi-	The Greek-based numeric prefix "hemi-" means "one half (1/2)." See also Prefixes & Words Based On Greek Number Names.
hen-	The Greek-based numeric prefix "hen-" means "one (1)."
hendeca-	The prefix "hendeca-" means "eleven (11)." See also Prefixes & Words Based On Greek Number Names.
hendecad	The noun and adjective "hendecad" means "a group of eleven (11) members." See also Prefixes & Words Based On Greek Number Names.
hendecagon	The noun and adjective "hendecagon" means "a plain figure with eleven (11) straight sides." See also Prefixes & Words Based On Greek Number Names.
hendecagram	1. The noun and adjective "hendecagram" means "an interconnected star figure with eleven (11) points formed by stellating a hendecagon." See also Prefixes & Words Based On Greek Number Names.
hendecagram	2. The noun "hendecagram" means "a word or character sequence consisting of eleven (11) characters."
hendecahedron	The noun and adjective "hendecahedron" means "a solid figure with eleven (11) planar faces." See also Prefixes & Words Based On Greek Number Names.
henheptaconta-	The prefix "henheptaconta-" means "seventy-one (71)." See also Numeric Prefixes Used In Chemistry.
henhexaconta-	The prefix "henhexaconta-" means "sixty-one (61)." See also Numeric Prefixes Used In Chemistry.
henicosa-	The prefix "henicosa-" means "twenty-one (21)." See also Numeric Prefixes Used In Chemistry.
hennonaconta-	The prefix "hennonaconta-" means "ninety-one (91)." See also Numeric Prefixes Used In Chemistry.
henoctaconta-	The prefix "henoctaconta-" means "eighty-one (81)." See also Numeric Prefixes Used In Chemistry.
henpentaconta-	The prefix "henpentaconta-" means "fifty-one (51)." See also Numeric Prefixes Used In Chemistry.
hentetraconta-	The prefix "hentetraconta-" means "forty-one (41)." See also Numeric Prefixes Used In Chemistry.
hentriaconta-	The prefix "hentriaconta-" means "thirty-one (31)." See also Numeric Prefixes Used In Chemistry.
hepta-	The prefix "hepta-" means "seven (7)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
heptaconta-	The prefix "heptaconta-" means "seventy (70)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
heptacontad	The noun and adjective "heptacontad" means "a group of seventy (70) members." See also Prefixes & Words Based On Greek Number Names.
heptacontadi-	The prefix "heptacontadi-" means "seventy-two (72)." "Heptacontadi-" is an alternate form of the prefix "heptacontakaidi-." See also Prefixes & Words Based On Greek Number Names.
heptacontaennea-	The prefix "heptacontaennea-" means "seventy-nine (79)." "Heptacontaennea-" is an alternate form of the prefix "heptacontakaiennea-."
heptacontagon	The noun and adjective "heptacontagon" means "a plain figure with seventy (70) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptacontagram	The noun and adjective "heptacontagram" means "an interconnected star figure with seventy (70) points formed by stellating a heptacontagon." See also Prefixes & Words Based On Greek Number Names.
heptacontahedron	The noun and adjective "heptacontahedron" means "a solid figure with seventy (70) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptacontahena-	The prefix "heptacontahena-" means "seventy-one (71)." "Heptacontahena-" is an alternate form of the prefix "heptacontakaihena-." See also Prefixes & Words Based On Greek Number Names.
heptacontahepta-	The prefix "heptacontahepta-" means "seventy-seven (77)." "Heptacontahepta-" is an alternate form of the prefix "heptacontakaihepta-."
heptacontahexa-	The prefix "heptacontahexa-" means "seventy-six (76)." "Heptacontahexa-" is an alternate form of the prefix "heptacontakaihexa-."
heptacontakaidi-	The prefix "heptacontakaidi-" means "seventy-two (72)." See also Prefixes & Words Based On Greek Number Names.
heptacontakaidigon	The noun and adjective "heptacontakaidigon" means "a plain figure with seventy-two (72) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptacontakaidigram	The noun and adjective "heptacontakaidigram" means "an interconnected star figure with seventy-two (72) points formed by stellating a heptacontakaidigon." See also Prefixes & Words Based On Greek Number Names.
heptacontakaidihedron	The noun and adjective "heptacontakaidihedron" means "a solid figure with seventy-two (72) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptacontakaidyad	The noun and adjective "heptacontakaidyad" means "a group of seventy-two (72) members." See also Prefixes & Words Based On Greek Number Names.
heptacontakaiennea-	The prefix "heptacontakaiennea-" means "seventy-nine (79)." See also Prefixes & Words Based On Greek Number Names.
heptacontakaiennead	The noun and adjective "heptacontakaiennead" means "a group of seventy-nine (79) members." See also Prefixes & Words Based On Greek Number Names.
heptacontakaienneagon	The noun and adjective "heptacontakaienneagon" means "a plain figure with seventy-nine (79) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptacontakaienneagram	The noun and adjective "heptacontakaienneagram" means "an interconnected star figure with seventy-nine (79) points formed by stellating a heptacontakaienneagon." See also Prefixes & Words Based On Greek Number Names.
heptacontakaienneahedron	The noun and adjective "heptacontakaienneahedron" means "a solid figure with seventy-nine (79) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihena-	The prefix "heptacontakaihena-" means "seventy-one (71)." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihenad	The noun and adjective "heptacontakaihenad" means "a group of seventy-one (71) members." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihenagon	The noun and adjective "heptacontakaihenagon" means "a plain figure with seventy-one (71) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihenagram	The noun and adjective "heptacontakaihenagram" means "an interconnected star figure with seventy-one (71) points formed by stellating a heptacontakaihenagon." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihenahedron	The noun and adjective "heptacontakaihenahedron" means "a solid figure with seventy-one (71) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihepta-	The prefix "heptacontakaihepta-" means "seventy-seven (77)." See also Prefixes & Words Based On Greek Number Names.
heptacontakaiheptad	The noun and adjective "heptacontakaiheptad" means "a group of seventy-seven (77) members." See also Prefixes & Words Based On Greek Number Names.
heptacontakaiheptagon	The noun and adjective "heptacontakaiheptagon" means "a plain figure with seventy-seven (77) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptacontakaiheptagram	The noun and adjective "heptacontakaiheptagram" means "an interconnected star figure with seventy-seven (77) points formed by stellating a heptacontakaiheptagon." See also Prefixes & Words Based On Greek Number Names.
heptacontakaiheptahedron	The noun and adjective "heptacontakaiheptahedron" means "a solid figure with seventy-seven (77) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihexa-	The prefix "heptacontakaihexa-" means "seventy-six (76)." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihexad	The noun and adjective "heptacontakaihexad" means "a group of seventy-six (76) members." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihexagon	The noun and adjective "heptacontakaihexagon" means "a plain figure with seventy-six (76) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihexagram	The noun and adjective "heptacontakaihexagram" means "an interconnected star figure with seventy-six (76) points formed by stellating a heptacontakaihexagon." See also Prefixes & Words Based On Greek Number Names.
heptacontakaihexahedron	The noun and adjective "heptacontakaihexahedron" means "a solid figure with seventy-six (76) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptacontakaiocta-	The prefix "heptacontakaiocta-" means "seventy-eight (78)." See also Prefixes & Words Based On Greek Number Names.
heptacontakaioctad	The noun and adjective "heptacontakaioctad" means "a group of seventy-eight (78) members." See also Prefixes & Words Based On Greek Number Names.
heptacontakaioctagon	The noun and adjective "heptacontakaioctagon" means "a plain figure with seventy-eight (78) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptacontakaioctagram	The noun and adjective "heptacontakaioctagram" means "an interconnected star figure with seventy-eight (78) points formed by stellating a heptacontakaioctagon." See also Prefixes & Words Based On Greek Number Names.
heptacontakaioctahedron	The noun and adjective "heptacontakaioctahedron" means "a solid figure with seventy-eight (78) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptacontakaipenta-	The prefix "heptacontakaipenta-" means "seventy-five (75)." See also Prefixes & Words Based On Greek Number Names.
heptacontakaipentad	The noun and adjective "heptacontakaipentad" means "a group of seventy-five (75) members." See also Prefixes & Words Based On Greek Number Names.
heptacontakaipentagon	The noun and adjective "heptacontakaipentagon" means "a plain figure with seventy-five (75) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptacontakaipentagram	The noun and adjective "heptacontakaipentagram" means "an interconnected star figure with seventy-five (75) points formed by stellating a heptacontakaipentagon." See also Prefixes & Words Based On Greek Number Names.
heptacontakaipentahedron	The noun and adjective "heptacontakaipentahedron" means "a solid figure with seventy-five (75) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptacontakaitetra-	The prefix "heptacontakaitetra-" means "seventy-four (74)." See also Prefixes & Words Based On Greek Number Names.
heptacontakaitetrad	The noun and adjective "heptacontakaitetrad" means "a group of seventy-four (74) members." See also Prefixes & Words Based On Greek Number Names.
heptacontakaitetragon	The noun and adjective "heptacontakaitetragon" means "a plain figure with seventy-four (74) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptacontakaitetragram	The noun and adjective "heptacontakaitetragram" means "an interconnected star figure with seventy-four (74) points formed by stellating a heptacontakaitetragon." See also Prefixes & Words Based On Greek Number Names.
heptacontakaitetrahedron	The noun and adjective "heptacontakaitetrahedron" means "a solid figure with seventy-four (74) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptacontakaitri-	The prefix "heptacontakaitri-" means "seventy-three (73)." See also Prefixes & Words Based On Greek Number Names.
heptacontakaitriad	The noun and adjective "heptacontakaitriad" means "a group of seventy-three (73) members." See also Prefixes & Words Based On Greek Number Names.
heptacontakaitrigon	The noun and adjective "heptacontakaitrigon" means "a plain figure with seventy-three (73) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptacontakaitrigram	The noun and adjective "heptacontakaitrigram" means "an interconnected star figure with seventy-three (73) points formed by stellating a heptacontakaitrigon." See also Prefixes & Words Based On Greek Number Names.
heptacontakaitrihedron	The noun and adjective "heptacontakaitrihedron" means "a solid figure with seventy-three (73) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptacontaocta-	The prefix "heptacontaocta-" means "seventy-eight (78)." "Heptacontaocta-" is an alternate form of the prefix "heptacontakaiocta-." See also Prefixes & Words Based On Greek Number Names.
heptacontapenta-	The prefix "heptacontapenta-" means "seventy-five (75)." "Heptacontapenta-" is an alternate form of the prefix "heptacontakaipenta-."
heptacontatetra-	The prefix "heptacontatetra-" means "seventy-four (74)." "Heptacontatetra-" is an alternate form of the prefix "heptacontakaitetra-."
heptacontatri-	The prefix "heptacontatri-" means "seventy-three (73)." "Heptacontatri-" is an alternate form of the prefix "heptacontakaitri-."
heptacta-	The prefix "heptacta-" means "seven hundred (700)." See also Numeric Prefixes Used In Chemistry.
heptad	The noun and adjective "heptad" means "a group of seven (7) members." See also Prefixes & Words Based On Greek Number Names.
heptadeca-	The prefix "heptadeca-" means "seventeen (17)." See also Numeric Prefixes Used In Chemistry.
heptagon	The noun and adjective "heptagon" means "a plain figure with seven (7) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptagram	1. The noun and adjective "heptagram" means "an interconnected star figure with seven (7) points formed by stellating a heptagon." See also Prefixes & Words Based On Greek Number Names.
heptagram	2. The noun "heptagram" means "a word or character sequence consisting of seven (7) characters."
heptahedron	The noun and adjective "heptahedron" means "a solid figure with seven (7) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptaheptaconta-	The prefix "heptaheptaconta-" means "seventy-seven (77)." See also Numeric Prefixes Used In Chemistry.
heptahexaconta-	The prefix "heptahexaconta-" means "sixty-seven (67)." See also Numeric Prefixes Used In Chemistry.
heptaicosa-	The prefix "heptaicosa-" means "twenty-seven (27)." See also Numeric Prefixes Used In Chemistry.
heptakaideca-	The prefix "heptakaideca-" means "seventeen (17)." See also Prefixes & Words Based On Greek Number Names.
heptakaidecad	The noun and adjective "heptakaidecad" means "a group of seventeen (17) members." See also Prefixes & Words Based On Greek Number Names.
heptakaidecagon	The noun and adjective "heptakaidecagon" means "a plain figure with seventeen (17) straight sides." See also Prefixes & Words Based On Greek Number Names.
heptakaidecagram	The noun and adjective "heptakaidecagram" means "an interconnected star figure with seventeen (17) points formed by stellating a heptakaidecagon." See also Prefixes & Words Based On Greek Number Names.
heptakaidecahedron	The noun and adjective "heptakaidecahedron" means "a solid figure with seventeen (17) planar faces." See also Prefixes & Words Based On Greek Number Names.
heptalia-	The prefix "heptalia-" means "seven thousand (7000)." See also Numeric Prefixes Used In Chemistry.
heptameter	The noun "heptameter" means "a verse consisting of seven (7) metrical feet."
heptangle	The noun "heptangle" means "a plane figure with seven (7) vertices."
heptanonaconta-	The prefix "heptanonaconta-" means "ninety-seven (97)." See also Numeric Prefixes Used In Chemistry.
heptaoctaconta-	The prefix "heptaoctaconta-" means "eighty-seven (87)." See also Numeric Prefixes Used In Chemistry.
heptapentaconta-	The prefix "heptapentaconta-" means "fifty-seven (57)." See also Numeric Prefixes Used In Chemistry.
heptatetraconta-	The prefix "heptatetraconta-" means "forty-seven (47)." See also Numeric Prefixes Used In Chemistry.
heptathlon	The noun "heptathlon" means "an athletic competition consisting of seven (7) separate events."
heptatriaconta-	The prefix "heptatriaconta-" means "thirty-seven (37)." See also Numeric Prefixes Used In Chemistry.
hexa-	The prefix "hexa-" means "six (6)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
hexaconta-	The prefix "hexaconta-" means "sixty (60)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
hexacontad	The noun and adjective "hexacontad" means "a group of sixty (60) members." See also Prefixes & Words Based On Greek Number Names.
hexacontadi-	The prefix "hexacontadi-" means "sixty-two (62)." "Hexacontadi-" is an alternate form of the prefix "hexacontakaidi-." See also Prefixes & Words Based On Greek Number Names.
hexacontaennea-	The prefix "hexacontaennea-" means "sixty-nine (69)." "Hexacontaennea-" is an alternate form of the prefix "hexacontakaiennea-."
hexacontagon	The noun and adjective "hexacontagon" means "a plain figure with sixty (60) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexacontagram	The noun and adjective "hexacontagram" means "an interconnected star figure with sixty (60) points formed by stellating a hexacontagon." See also Prefixes & Words Based On Greek Number Names.
hexacontahedron	The noun and adjective "hexacontahedron" means "a solid figure with sixty (60) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexacontahena-	The prefix "hexacontahena-" means "sixty-one (61)." "Hexacontahena-" is an alternate form of the prefix "hexacontakaihena-." See also Prefixes & Words Based On Greek Number Names.
hexacontahepta-	The prefix "hexacontahepta-" means "sixty-seven (67)." "Hexacontahepta-" is an alternate form of the prefix "hexacontakaihepta-."
hexacontahexa-	The prefix "hexacontahexa-" means "sixty-six (66)." "Hexacontahexa-" is an alternate form of the prefix "hexacontakaihexa-."
hexacontakaidi-	The prefix "hexacontakaidi-" means "sixty-two (62)." See also Prefixes & Words Based On Greek Number Names.
hexacontakaidigon	The noun and adjective "hexacontakaidigon" means "a plain figure with sixty-two (62) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexacontakaidigram	The noun and adjective "hexacontakaidigram" means "an interconnected star figure with sixty-two (62) points formed by stellating a hexacontakaidigon." See also Prefixes & Words Based On Greek Number Names.
hexacontakaidihedron	The noun and adjective "hexacontakaidihedron" means "a solid figure with sixty-two (62) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexacontakaidyad	The noun and adjective "hexacontakaidyad" means "a group of sixty-two (62) members." See also Prefixes & Words Based On Greek Number Names.
hexacontakaiennea-	The prefix "hexacontakaiennea-" means "sixty-nine (69)." See also Prefixes & Words Based On Greek Number Names.
hexacontakaiennead	The noun and adjective "hexacontakaiennead" means "a group of sixty-nine (69) members." See also Prefixes & Words Based On Greek Number Names.
hexacontakaienneagon	The noun and adjective "hexacontakaienneagon" means "a plain figure with sixty-nine (69) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexacontakaienneagram	The noun and adjective "hexacontakaienneagram" means "an interconnected star figure with sixty-nine (69) points formed by stellating a hexacontakaienneagon." See also Prefixes & Words Based On Greek Number Names.
hexacontakaienneahedron	The noun and adjective "hexacontakaienneahedron" means "a solid figure with sixty-nine (69) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihena-	The prefix "hexacontakaihena-" means "sixty-one (61)." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihenad	The noun and adjective "hexacontakaihenad" means "a group of sixty-one (61) members." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihenagon	The noun and adjective "hexacontakaihenagon" means "a plain figure with sixty-one (61) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihenagram	The noun and adjective "hexacontakaihenagram" means "an interconnected star figure with sixty-one (61) points formed by stellating a hexacontakaihenagon." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihenahedron	The noun and adjective "hexacontakaihenahedron" means "a solid figure with sixty-one (61) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihepta-	The prefix "hexacontakaihepta-" means "sixty-seven (67)." See also Prefixes & Words Based On Greek Number Names.
hexacontakaiheptad	The noun and adjective "hexacontakaiheptad" means "a group of sixty-seven (67) members." See also Prefixes & Words Based On Greek Number Names.
hexacontakaiheptagon	The noun and adjective "hexacontakaiheptagon" means "a plain figure with sixty-seven (67) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexacontakaiheptagram	The noun and adjective "hexacontakaiheptagram" means "an interconnected star figure with sixty-seven (67) points formed by stellating a hexacontakaiheptagon." See also Prefixes & Words Based On Greek Number Names.
hexacontakaiheptahedron	The noun and adjective "hexacontakaiheptahedron" means "a solid figure with sixty-seven (67) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihexa-	The prefix "hexacontakaihexa-" means "sixty-six (66)." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihexad	The noun and adjective "hexacontakaihexad" means "a group of sixty-six (66) members." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihexagon	The noun and adjective "hexacontakaihexagon" means "a plain figure with sixty-six (66) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihexagram	The noun and adjective "hexacontakaihexagram" means "an interconnected star figure with sixty-six (66) points formed by stellating a hexacontakaihexagon." See also Prefixes & Words Based On Greek Number Names.
hexacontakaihexahedron	The noun and adjective "hexacontakaihexahedron" means "a solid figure with sixty-six (66) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexacontakaiocta-	The prefix "hexacontakaiocta-" means "sixty-eight (68)." See also Prefixes & Words Based On Greek Number Names.
hexacontakaioctad	The noun and adjective "hexacontakaioctad" means "a group of sixty-eight (68) members." See also Prefixes & Words Based On Greek Number Names.
hexacontakaioctagon	The noun and adjective "hexacontakaioctagon" means "a plain figure with sixty-eight (68) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexacontakaioctagram	The noun and adjective "hexacontakaioctagram" means "an interconnected star figure with sixty-eight (68) points formed by stellating a hexacontakaioctagon." See also Prefixes & Words Based On Greek Number Names.
hexacontakaioctahedron	The noun and adjective "hexacontakaioctahedron" means "a solid figure with sixty-eight (68) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexacontakaipenta-	The prefix "hexacontakaipenta-" means "sixty-five (65)." See also Prefixes & Words Based On Greek Number Names.
hexacontakaipentad	The noun and adjective "hexacontakaipentad" means "a group of sixty-five (65) members." See also Prefixes & Words Based On Greek Number Names.
hexacontakaipentagon	The noun and adjective "hexacontakaipentagon" means "a plain figure with sixty-five (65) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexacontakaipentagram	The noun and adjective "hexacontakaipentagram" means "an interconnected star figure with sixty-five (65) points formed by stellating a hexacontakaipentagon." See also Prefixes & Words Based On Greek Number Names.
hexacontakaipentahedron	The noun and adjective "hexacontakaipentahedron" means "a solid figure with sixty-five (65) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexacontakaitetra-	The prefix "hexacontakaitetra-" means "sixty-four (64)." See also Prefixes & Words Based On Greek Number Names.
hexacontakaitetrad	The noun and adjective "hexacontakaitetrad" means "a group of sixty-four (64) members." See also Prefixes & Words Based On Greek Number Names.
hexacontakaitetragon	The noun and adjective "hexacontakaitetragon" means "a plain figure with sixty-four (64) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexacontakaitetragram	The noun and adjective "hexacontakaitetragram" means "an interconnected star figure with sixty-four (64) points formed by stellating a hexacontakaitetragon." See also Prefixes & Words Based On Greek Number Names.
hexacontakaitetrahedron	The noun and adjective "hexacontakaitetrahedron" means "a solid figure with sixty-four (64) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexacontakaitri-	The prefix "hexacontakaitri-" means "sixty-three (63)." See also Prefixes & Words Based On Greek Number Names.
hexacontakaitriad	The noun and adjective "hexacontakaitriad" means "a group of sixty-three (63) members." See also Prefixes & Words Based On Greek Number Names.
hexacontakaitrigon	The noun and adjective "hexacontakaitrigon" means "a plain figure with sixty-three (63) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexacontakaitrigram	The noun and adjective "hexacontakaitrigram" means "an interconnected star figure with sixty-three (63) points formed by stellating a hexacontakaitrigon." See also Prefixes & Words Based On Greek Number Names.
hexacontakaitrihedron	The noun and adjective "hexacontakaitrihedron" means "a solid figure with sixty-three (63) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexacontaocta-	The prefix "hexacontaocta-" means "sixty-eight (68)." "Hexacontaocta-" is an alternate form of the prefix "hexacontakaiocta-." See also Prefixes & Words Based On Greek Number Names.
hexacontapenta-	The prefix "hexacontapenta-" means "sixty-five (65)." "Hexacontapenta-" is an alternate form of the prefix "hexacontakaipenta-."
hexacontatetra-	The prefix "hexacontatetra-" means "sixty-four (64)." "Hexacontatetra-" is an alternate form of the prefix "hexacontakaitetra-."
hexacontatri-	The prefix "hexacontatri-" means "sixty-three (63)." "Hexacontatri-" is an alternate form of the prefix "hexacontakaitri-."
hexacta-	The prefix "hexacta-" means "six hundred (600)." See also Numeric Prefixes Used In Chemistry.
hexad	The noun and adjective "hexad" means "a group of six (6) members." See also Prefixes & Words Based On Greek Number Names.
hexadeca-	The prefix "hexadeca-" means "sixteen (16)." See also Numeric Prefixes Used In Chemistry.
hexadecimal	The adjective "hexadecimal" means "based on the number sixteen (16)." See also "base sixteen" and Base Number Notation. Usage: A numeral system based on the number sixteen (16) is properly called "sexdecimal." The more common term "hexadecimal" is a bizarre combination of the Greek-based prefix "hexakaideca-" (16) and the Latin-based term "sexdecimal" (16) in an apparent attempt to rid mathematics of the evil influence of "sex-."
hexagon	The noun and adjective "hexagon" means "a plain figure with six (6) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexagram	1. The noun and adjective "hexagram" means "an interconnected star figure with six (6) points formed by stellating a hexagon." See also Prefixes & Words Based On Greek Number Names.
hexagram	2. The noun "hexagram" means "a word or character sequence consisting of six (6) characters."
hexahedron	The noun and adjective "hexahedron" means "a solid figure with six (6) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexaheptaconta-	The prefix "hexaheptaconta-" means "seventy-six (76)." See also Numeric Prefixes Used In Chemistry.
hexahexaconta-	The prefix "hexahexaconta-" means "sixty-six (66)." See also Numeric Prefixes Used In Chemistry.
hexaicosa-	The prefix "hexaicosa-" means "twenty-six (26)." See also Numeric Prefixes Used In Chemistry.
hexakaideca-	The prefix "hexakaideca-" means "sixteen (16)." See also Prefixes & Words Based On Greek Number Names.
hexakaidecad	The noun and adjective "hexakaidecad" means "a group of sixteen (16) members." See also Prefixes & Words Based On Greek Number Names.
hexakaidecagon	The noun and adjective "hexakaidecagon" means "a plain figure with sixteen (16) straight sides." See also Prefixes & Words Based On Greek Number Names.
hexakaidecagram	The noun and adjective "hexakaidecagram" means "an interconnected star figure with sixteen (16) points formed by stellating a hexakaidecagon." See also Prefixes & Words Based On Greek Number Names.
hexakaidecahedron	The noun and adjective "hexakaidecahedron" means "a solid figure with sixteen (16) planar faces." See also Prefixes & Words Based On Greek Number Names.
hexalia-	The prefix "hexalia-" means "six thousand (6000)." See also Numeric Prefixes Used In Chemistry.
hexameter	The noun "hexameter" means "a verse consisting of six (6) metrical feet."
hexangle	The noun "hexangle" means "a plane figure with six (6) vertices."
hexanonaconta-	The prefix "hexanonaconta-" means "ninety-six (96)." See also Numeric Prefixes Used In Chemistry.
hexaoctaconta-	The prefix "hexaoctaconta-" means "eighty-six (86)." See also Numeric Prefixes Used In Chemistry.
hexapentaconta-	The prefix "hexapentaconta-" means "fifty-six (56)." See also Numeric Prefixes Used In Chemistry.
hexatetraconta-	The prefix "hexatetraconta-" means "forty-six (46)." See also Numeric Prefixes Used In Chemistry.
hexatriaconta-	The prefix "hexatriaconta-" means "thirty-six (36)." See also Numeric Prefixes Used In Chemistry.
hour	The noun "hour" means "one twenty-fourth (1/24) of a day." Origin: In antiquity, each night was divided into twelve (12) hours and each daytime was divided into twelve (12) hours. The duration of night hours and daylight hours changed with latitude and the seasons. Modern timekeeping has changed the definition of an hour to a fixed duration equal to thirty-six hundred (3,600) Universal Coordinated Time (UTC) seconds.
hourly	The adjective "hourly" means "recurring once (1) each hour."
hundred	The noun and adjective "hundred" means "multiplied by one hundred (100))." See also Number Names.
hundredth	1. As part of the name of an ordinal number, the noun and adjective "hundredth" means "a multiple of one hundred (100)."
hundredth	2. As part of the name of a rational fraction, the noun and adjective "hundredth" means "divided by one hundred (1/100 = 0.010)."
hundredweight	The noun and adjective "hundredweight" (abbreviated cwt.) means "one hundred (100) pounds."
i	The Latin lower case letter "i" represents the "imaginary unit," the imaginary number that is the square root of minus one (-1). See also "Imaginary Unit."
icosa-	The prefix "icosa-" means "twenty (20)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
icosad	The noun and adjective "icosad" means "a group of twenty (20) members." See also Prefixes & Words Based On Greek Number Names.
icosagon	The noun and adjective "icosagon" means "a plain figure with twenty (20) straight sides." See also Prefixes & Words Based On Greek Number Names.
icosagram	The noun and adjective "icosagram" means "an interconnected star figure with twenty (20) points formed by stellating a icosagon." See also Prefixes & Words Based On Greek Number Names.
icosahedron	The noun and adjective "icosahedron" means "a solid figure with twenty (20) planar faces." See also Prefixes & Words Based On Greek Number Names.
icosidi-	The prefix "icosidi-" means "twenty-two (22)." "Icosidi-" is an alternate form of the prefix "icosikaidi-." See also Prefixes & Words Based On Greek Number Names.
icosiennea-	The prefix "icosiennea-" means "twenty-nine (29)." "Icosiennea-" is an alternate form of the prefix "icosikaiennea-."
icosihena-	The prefix "icosihena-" means "twenty-one (21)." "Icosihena-" is an alternate form of the prefix "icosikaihena-."
icosihepta-	The prefix "icosihepta-" means "twenty-seven (27)." "Icosihepta-" is an alternate form of the prefix "icosikaihepta-."
icosihexa-	The prefix "icosihexa-" means "twenty-six (26)." "Icosihexa-" is an alternate form of the prefix "icosikaihexa-."
icosikaidi-	The prefix "icosikaidi-" means "twenty-two (22)." See also Prefixes & Words Based On Greek Number Names.
icosikaidigon	The noun and adjective "icosikaidigon" means "a plain figure with twenty-two (22) straight sides." See also Prefixes & Words Based On Greek Number Names.
icosikaidigram	The noun and adjective "icosikaidigram" means "an interconnected star figure with twenty-two (22) points formed by stellating a icosikaidigon." See also Prefixes & Words Based On Greek Number Names.
icosikaidihedron	The noun and adjective "icosikaidihedron" means "a solid figure with twenty-two (22) planar faces." See also Prefixes & Words Based On Greek Number Names.
icosikaidyad	The noun and adjective "icosikaidyad" means "a group of twenty-two (22) members." See also Prefixes & Words Based On Greek Number Names.
icosikaiennea-	The prefix "icosikaiennea-" means "twenty-nine (29)." See also Prefixes & Words Based On Greek Number Names.
icosikaiennead	The noun and adjective "icosikaiennead" means "a group of twenty-nine (29) members." See also Prefixes & Words Based On Greek Number Names.
icosikaienneagon	The noun and adjective "icosikaienneagon" means "a plain figure with twenty-nine (29) straight sides." See also Prefixes & Words Based On Greek Number Names.
icosikaienneagram	The noun and adjective "icosikaienneagram" means "an interconnected star figure with twenty-nine (29) points formed by stellating a icosikaienneagon." See also Prefixes & Words Based On Greek Number Names.
icosikaienneahedron	The noun and adjective "icosikaienneahedron" means "a solid figure with twenty-nine (29) planar faces." See also Prefixes & Words Based On Greek Number Names.
icosikaihena-	The prefix "icosikaihena-" means "twenty-one (21)." See also Prefixes & Words Based On Greek Number Names.
icosikaihenad	The noun and adjective "icosikaihenad" means "a group of twenty-one (21) members." See also Prefixes & Words Based On Greek Number Names.
icosikaihenagon	The noun and adjective "icosikaihenagon" means "a plain figure with twenty-one (21) straight sides." See also Prefixes & Words Based On Greek Number Names.
icosikaihenagram	The noun and adjective "icosikaihenagram" means "an interconnected star figure with twenty-one (21) points formed by stellating a icosikaihenagon." See also Prefixes & Words Based On Greek Number Names.
icosikaihenahedron	The noun and adjective "icosikaihenahedron" means "a solid figure with twenty-one (21) planar faces." See also Prefixes & Words Based On Greek Number Names.
icosikaihepta-	The prefix "icosikaihepta-" means "twenty-seven (27)." See also Prefixes & Words Based On Greek Number Names.
icosikaiheptad	The noun and adjective "icosikaiheptad" means "a group of twenty-seven (27) members." See also Prefixes & Words Based On Greek Number Names.
icosikaiheptagon	The noun and adjective "icosikaiheptagon" means "a plain figure with twenty-seven (27) straight sides." See also Prefixes & Words Based On Greek Number Names.
icosikaiheptagram	The noun and adjective "icosikaiheptagram" means "an interconnected star figure with twenty-seven (27) points formed by stellating a icosikaiheptagon." See also Prefixes & Words Based On Greek Number Names.
icosikaiheptahedron	The noun and adjective "icosikaiheptahedron" means "a solid figure with twenty-seven (27) planar faces." See also Prefixes & Words Based On Greek Number Names.
icosikaihexa-	The prefix "icosikaihexa-" means "twenty-six (26)." See also Prefixes & Words Based On Greek Number Names.
icosikaihexad	The noun and adjective "icosikaihexad" means "a group of twenty-six (26) members." See also Prefixes & Words Based On Greek Number Names.
icosikaihexagon	The noun and adjective "icosikaihexagon" means "a plain figure with twenty-six (26) straight sides." See also Prefixes & Words Based On Greek Number Names.
icosikaihexagram	The noun and adjective "icosikaihexagram" means "an interconnected star figure with twenty-six (26) points formed by stellating a icosikaihexagon." See also Prefixes & Words Based On Greek Number Names.
icosikaihexahedron	The noun and adjective "icosikaihexahedron" means "a solid figure with twenty-six (26) planar faces." See also Prefixes & Words Based On Greek Number Names.
icosikaiocta-	The prefix "icosikaiocta-" means "twenty-eight (28)." See also Prefixes & Words Based On Greek Number Names.
icosikaioctad	The noun and adjective "icosikaioctad" means "a group of twenty-eight (28) members." See also Prefixes & Words Based On Greek Number Names.
icosikaioctagon	The noun and adjective "icosikaioctagon" means "a plain figure with twenty-eight (28) straight sides." See also Prefixes & Words Based On Greek Number Names.
icosikaioctagram	The noun and adjective "icosikaioctagram" means "an interconnected star figure with twenty-eight (28) points formed by stellating a icosikaioctagon." See also Prefixes & Words Based On Greek Number Names.
icosikaioctahedron	The noun and adjective "icosikaioctahedron" means "a solid figure with twenty-eight (28) planar faces." See also Prefixes & Words Based On Greek Number Names.
icosikaipenta-	The prefix "icosikaipenta-" means "twenty-five (25)." See also Prefixes & Words Based On Greek Number Names.
icosikaipentad	The noun and adjective "icosikaipentad" means "a group of twenty-five (25) members." See also Prefixes & Words Based On Greek Number Names.
icosikaipentagon	The noun and adjective "icosikaipentagon" means "a plain figure with twenty-five (25) straight sides." See also Prefixes & Words Based On Greek Number Names.
icosikaipentagram	The noun and adjective "icosikaipentagram" means "an interconnected star figure with twenty-five (25) points formed by stellating a icosikaipentagon." See also Prefixes & Words Based On Greek Number Names.
icosikaipentahedron	The noun and adjective "icosikaipentahedron" means "a solid figure with twenty-five (25) planar faces." See also Prefixes & Words Based On Greek Number Names.
icosikaitetra-	The prefix "icosikaitetra-" means "twenty-four (24)." See also Prefixes & Words Based On Greek Number Names.
icosikaitetrad	The noun and adjective "icosikaitetrad" means "a group of twenty-four (24) members." See also Prefixes & Words Based On Greek Number Names.
icosikaitetragon	The noun and adjective "icosikaitetragon" means "a plain figure with twenty-four (24) straight sides." See also Prefixes & Words Based On Greek Number Names.
icosikaitetragram	The noun and adjective "icosikaitetragram" means "an interconnected star figure with twenty-four (24) points formed by stellating a icosikaitetragon." See also Prefixes & Words Based On Greek Number Names.
icosikaitetrahedron	The noun and adjective "icosikaitetrahedron" means "a solid figure with twenty-four (24) planar faces." See also Prefixes & Words Based On Greek Number Names.
icosikaitri-	The prefix "icosikaitri-" means "twenty-three (23)." See also Prefixes & Words Based On Greek Number Names.
icosikaitriad	The noun and adjective "icosikaitriad" means "a group of twenty-three (23) members." See also Prefixes & Words Based On Greek Number Names.
icosikaitrigon	The noun and adjective "icosikaitrigon" means "a plain figure with twenty-three (23) straight sides." See also Prefixes & Words Based On Greek Number Names.
icosikaitrigram	The noun and adjective "icosikaitrigram" means "an interconnected star figure with twenty-three (23) points formed by stellating a icosikaitrigon." See also Prefixes & Words Based On Greek Number Names.
icosikaitrihedron	The noun and adjective "icosikaitrihedron" means "a solid figure with twenty-three (23) planar faces." See also Prefixes & Words Based On Greek Number Names.
icosiocta-	The prefix "icosiocta-" means "twenty-eight (28)." "Icosiocta-" is an alternate form of the prefix "icosikaiocta-." See also Prefixes & Words Based On Greek Number Names.
icosipenta-	The prefix "icosipenta-" means "twenty-five (25)." "Icosipenta-" is an alternate form of the prefix "icosikaipenta-."
icositetra-	The prefix "icositetra-" means "twenty-four (24)." "Icositetra-" is an alternate form of the prefix "icosikaitetra-."
icositri-	The prefix "icositri-" means "twenty-three (23)." "Icositri-" is an alternate form of the prefix "icosikaitri-."
imaginary number	An imaginary number is a number that can be represented as the square root of a negative real number. See also "Imaginary Number."
imaginary unit	The "imaginary unit" (symbol: i ) is the imaginary number that is the square root of minus one (-1). See also "Imaginary Unit."
incalculable	The adjective "incalculable" means "infinite, or more generally, a very large number."
individual	The noun and adjective "individual" means "one (1) particular being or thing as distinguished from a group." See also "Individual."
infinite	The adjective "infinite" means "greater than any assignable quantity." See also "Infinite."
infinitely	The adverb "infinitely" means "without bound." See also "Infinity."
infinitesimal	The adjective "infinitesimal" means "smaller than any assignable quantity greater than zero." See also "Infinitesimal."
infinitesimality	The noun "infinitesimality" (symbol: 1/∞ ) means "a quantity smaller than every real number greater than zero (0)." See also "Infinitesimal."
infinitesimally	The adverb "infinitesimally" means "immeasurably small." See also "Infinitesimal."
infinity	The noun "infinity" (symbol: ∞ ) means "an unbounded quantity greater than every real number." See also "Infinity."
∞	The symbol ∞ represents "infinity," an infinitely large number. See also "Infinity."
initial	The adjective "initial" means "first (1^st)."
innumerable	The adjective "innumerable" means "infinite, or more generally, a very large number of individuals or discrete objects."
innumeracy	The noun "innumeracy" means "an incapacity to understand and work with numbers."
innumerate	The adjective "innumerate" means "lacking the capacity to understand and work with numbers."
innumerous	The adjective "innumerous" means "infinite, or more generally, a very large number of individuals or discrete objects."
integer	An integer is a whole number, i.e., a real number with no fractional portion. The integers include the positive integers, zero, and the negative integers. See also "Integer" and Integer Factors.
integer number	The compound noun "integer number" means "an integer."
irrational number	An irrational number is a real number that is not a rational number. Examples include 2^½, φ, e, π, e^π, etc. See also "Irrational Number."
j	The English lower case letter "j" is an alternate symbol for the "imaginary unit" used in engineering and technology. See also "Imaginary Unit."
jillion	The slang noun and adjective "jillion" means "an very large number." "Jillion" is a parody of the Chuquet number naming system.
k-	The metric prefix symbol k- (metric prefix: "kilo-" ) denotes a multiple of one thousand (10³ = 1E+03 = 1,000) as defined by Le Système International d'Unités (SI).
Ki-	The compound binary prefix symbol Ki- (binary prefix: "kibi-" ) denotes a multiple of two to the tenth power (2¹⁰ = 1,024) as defined by the International Electrotechnical Commission (IEC). See also "kilobinary."
kibi-	The binary prefix "kibi-" (prefix symbol: Ki- ) denotes a multiple of two to the tenth power (2¹⁰ = 1,024) as defined by the International Electrotechnical Commission (IEC). See also "kilobinary."
kibin	The adjective and noun "kibin" means "one thousand twenty-four (2¹⁰ = 1024)." See also "kilobinary."
kibinal	The adjective "kibinal" means "based on the number one thousand twenty-four (2¹⁰ = 1024)." See also "kilobinary," "kibin," "mebin," "gibin," "tebin," "pebin," "exbin," and Base Number Systems.
kilia-	The prefix "kilia-" means "one thousand (1000)." See also Numeric Prefixes Used In Chemistry.
kilo-	The metric prefix "kilo-" (prefix symbol: k- ) denotes a multiple of one thousand (10³ = 1E+03 = 1,000) as defined by Le Système International d'Unités (SI).
kilobinary	The adjective "kilobinary" means "two to the tenth power (2¹⁰ = 1,024)." See also binary prefix "kibi-" and compound binary prefix symbol "Ki-."
lac	The adjective and noun "lac" is an alternate spelling of "lakh."
lakh	The adjective and noun "lakh" means "one hundred thousand (100,000 usually punctuated 1,00,000 in India.)"
least	The superlative adjective "least" means "the smallest non-discrete quantity." See usage note at "few."
less	The comparative adjective "less" means "a smaller non-discrete quantity." See usage note at "few."
lesser	The comparative adjective "lesser" means "having a smaller size or quantity."
life, the universe, and everything	According to The Hitchhiker's Guide to the Galaxy, the answer to the great question of "life, the universe, and everything" is "forty-two (42)." Watch Deep Thought make its grand pronouncement after 7,500,000 years of exhaustive cogitation.
little	The positive adjective "little" means "having a relatively small size or quantity." See usage note at "few."
lone	The adjective "lone" means "one (1)."
long dozen	The compound noun "long dozen" means "thirteen (13)."
lustrum	The noun "lustrum" means "a period of five (5) years."
m-	The metric prefix symbol m- (metric prefix: "milli-" ) denotes a multiple of one one-thousandth (10^-3 = 1E-03 = 0.001) as defined by Le Système International d'Unités (SI).
M-	The metric prefix symbol M- (metric prefix: "mega-" ) denotes a multiple of one million (10⁶ = 1E+06 = 1,000,000) as defined by Le Système International d'Unités (SI).
majority	The noun "majority" means "more than one half of the members of a group." For example, a majority of 25 is 13 to 25 and a majority of 26 is 14 to 26.
many	The noun and positive adjective "many" means "a relatively large number of individuals or discrete objects." Usage: The adjectives "many/more/most" are used with count nouns and collection nouns (integers), while the adjectives "much/more/most" are used with mass nouns (non-discrete quantities). Example: "Many students feel they spend too much money on books."
mark twain	The archaic expression "mark twain" was used by Nineteenth Century American rivermen to denote a "water depth of two (2) fathoms (approximately 3.7 meters.)" American writer Samuel Langhorne Clemens (1835-1910) used "Mark Twain" as his pseudonym.
mebi-	The binary prefix "mebi-" (prefix symbol: Mi- ) denotes a multiple of two to the twentieth power (2²⁰ = 1,048,576) as defined by the International Electrotechnical Commission (IEC). See also "megabinary."
mebin	The adjective and noun "mebin" means "two to the twentieth power (2²⁰ = 1,048,576)." See also "megabinary" and "mebi-."
mega-	The metric prefix "mega-" (prefix symbol: M- ) denotes a multiple of one million (10⁶ = 1E+06 = 1,000,000) as defined by Le Système International d'Unités (SI).
megabinary	The adjective "megabinary" means "two to the twentieth power (2²⁰ = 1,048,576)." See also binary prefix "mebi-" and compound binary prefix symbol "Mi-."
Mi-	The compound binary prefix symbol Mi- (binary prefix: "mebi-" ) denotes a multiple of two to the twentieth power (2²⁰ = 1,048,576) as defined by the International Electrotechnical Commission (IEC). See also "megabinary."
micro-	The metric prefix "micro-" (prefix symbol: μ- {Greek lower case letter mu} ) denotes a multiple of one one-millionth (10^-6 = 1E-06 = 0.000 001) as defined by Le Système International d'Unités (SI).
mil	The noun "mil" means "divided by one thousand (1/1,000 = 0.001)." In thickness measurement, a "mil" is equal to one one-thousandth of an inch or 25.400 micrometers. In angular measurement, a "mil" is equal to one sixty-four-hundredth (1/6,400) of a circle (or roughly one one-thousandth of a radian.) See also "mill."
mile	The noun "mile" literally means "one thousand (1,000) paces." An "international mile" is equal to 5,280 feet or 1,609.344 meters. A "nautical mile" is equal to 1,852 meters or approximately 6,076 feet.
mill	The noun "mill" means "divided by one thousand (1/1,000 = 0.001)." In currency, a "mill" is equal to one one-thousandth of a dollar ($0.001). See also "mil."
mille-	1. The numeric prefix "mille-" means "one thousand (1,000)." This prefix is derived from the Latin cardinal number "mille (ↀ or M)."
millenary	1. The noun and adjective "millenary" means "a group of one thousand (1000)."
	2. The noun and adjective "millenary" means "a period of one thousand (1000) years."
	3. The noun and adjective "millenary" means "a one thousand (1000) year anniversary."
	4. The adjective and noun "millenary" means "one thousandth (1000th) in rank or order."
millennial	1. The adjective and noun "millennial" means "recurring every one thousand (1000) years."
	2. The adjective and noun "millennial" means "lasting one thousand (1000) years."
	3. The noun and adjective "millennial" means "a one thousand (1000) year anniversary."
millennium	The noun and adjective "millennium" means "a period of one thousand (1000) years."
millesimal	The adjective "millesimal" means "based on the number one thousand (1000)." The SI (Le Système International d'Unités) metric system employs millesimal prefixes. See also Base Number Systems.
milli-	1. The numeric prefix "milli-" means "one thousand (1,000)." This prefix is derived from the Latin cardinal number "mille (ↀ or M)."
milli-	2. The metric prefix "milli-" (prefix symbol: m- ) denotes a multiple of one one-thousandth (10^-3 = 1E-03 = 0.001) as defined by Le Système International d'Unités (SI).
milliard	The noun and adjective "milliard" means "multiplied by ten to the ninth power (10⁹ = 1E+09 = 1,000,000,000)" in the modified Chuquet number naming system.
million	The noun and adjective "million" means "multiplied by one million (1,000,000)." See also Large Numbers.
millionth	1. As part of the name of an ordinal number, the noun and adjective "millionth" means "a multiple of one million (1,000,000)."
millionth	2. As part of the name of a rational fraction, the noun and adjective "millionth" means "divided by one million (1/1,000,000 = 0.000 001)."
millipede	The noun "millipede" literally means "having one thousand (1,000) feet." A "millipede" is "an insect of the class Diplopoda."
minority	The noun "minority" means "less than one half of the members of a group." For example, a minority of 25 is 0 to 12 and a minority of 26 is also 0 to 12. "Minority" can also mean "an under-represented portion of a population."
minus	1. The preposition "minus" (symbol: − {minus sign} ) denotes either the operation of subtraction or the operation of unary negation.
minus	2. The adjective and noun "minus" (prefix symbol: − {minus sign} ) means "negative" or "less than zero (<0)." See also "Minus."
−	The symbol − {minus sign} is pronounced as "minus". The "minus sign" is used as a prefix to denote a negative number. As a mathematical operator, the "minus sign" represents either the operation of subtraction or the operation of unary negation. The "minus sign" is also used to denote a negative polarity or direction. See also "Minus Sign."
minute	The noun "minute" means "divided by sixty (1/60)." In time measurement, a "minute" is "one sixtieth (1/60) of an hour" or "one one-thousand-four-hundred-fortieth (1/1,440) of a day." In angular measurement, a "minute" (suffix symbol: -′ {prime} ) is "one sixtieth (1/60) of a degree (suffix symbol: -° {degree symbol} )" or "one twenty-one-thousand-six-hundredth (1/21,600) of a circle."
Modified Chuquet System	The "modified Chuquet number naming system" or "Modified Chuquet System" is a modifcation of the "Chuquet System" that uses the suffix "-illiard" to denote a number one thousand (1000) times greater than the corresponding "Chuquet System" number with the "-illion" suffix. Example: In the "Modified Chuquet System," one billiard = 10^(6×2)+3 = 10¹²⁺³ = 10¹⁵ = 1E+15 = 1,000,000,000,000,000. See also Number Naming Systems.
moiety	The noun "moiety" means "divided by two (1/2)."
mon-	The prefix "mon-" means "one (1)."
monad	The noun and adjective "monad" means "a group with only one (1) member." See also Prefixes & Words Based On Greek Number Names.
monarch	The noun "monarch" means "one (1) person who rules alone." See also Prefixes & Words Based On Greek Number Names.
monarchy	The noun "monarchy" means "rule by only one (1) person."
mono-	The prefix "mono-" means "one (1)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
monogamic	The adjective "monogamic" means "having a single (1) marriage or exclusive sexual relationship between only two (2) individuals." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
monogamous	The adjective "monogamous" means "having a single (1) marriage or exclusive sexual relationship between only two (2) individuals."
monogamously	The adverb "monogamously" means "maintaining a single (1) marriage or exclusive sexual relationship between only two (2) individuals."
monogamy	The noun "monogamy" means "a single (1) marriage or exclusive sexual relationship between only two (2) individuals."
monogram	1. The noun and verb "monogram" means "a graphic design composed of the first (1st) character of one or more (most commonly three (3)) words or parts of a name."
monogram	2. The noun "monogram" means "a word consisting of only one (1) character."
monograph	The noun and adjective "monograph" means "a scholarly book or treatise on one (1) specific subject."
monthly	The adjective "monthly" means "recurring once (1) each month."
more	The comparative adjective "more" means "a larger number or quantity." See usage note at "many."
most	The superlative adjective "most" means "the largest number or quantity." See usage note at "many."
μ-	The metric prefix symbol μ- {Greek lower case letter mu} (metric prefix: "micro-" ) denotes a multiple of one one-millionth (10^-6 = 1E-06 = 0.000 001) as defined by Le Système International d'Unités (SI).
much	The noun and positive adjective "much" means "a relatively large non-discrete quantity." See usage note at "many."
multi-	The prefix "multi-" means "having more than one (>1)."
multiple	1. The adjective "multiple" means "having more than one (>1)."
multiple	2. The noun "multiple" means "the product of a given number times an integer." See also "Multiple."
myria-	The prefix "myria-" means "ten thousand (10000)." See also Numeric Prefixes Used In Chemistry.
myriad	The adjective and noun "myriad" derives from the Greek cardinal number "myriad" meaning "ten thousand (10⁴ = 10,000)." "Myriad" can more generally mean "a large number."
myriamyriad	The adjective and noun "myriamyriad" means "one hundred million (10⁸ = 100,000,000)."
N	The Latin letter "N" is a symbol for the logical value "no".
n-	The metric prefix symbol n- (metric prefix: "nano-" ) denotes a multiple of ten to the negative ninth power (10^-9 = 1E-09 = 0.000 000 001) as defined by Le Système International d'Unités (SI).
nano-	The metric prefix "nano-" (prefix symbol: n- ) denotes a multiple of ten to the negative ninth power (10^-9 = 1E-09 = 0.000 000 001) as defined by Le Système International d'Unités (SI).
Napier's Constant	"Napier's Constant," also known as the "natural logarithmic base," (symbol: e ) is the base of the natural, hyperbolic, or Naperian logarithms. "Napier's Constant" is a transcendental number approximately 2.718 281 828 459. Scottish mathematician John Napier (1550-1617) published the first description of logarithms in 1614. See also "The Natural Logarithmic Base" and "e."
narrowly	The adverb "narrowly" means "only slightly more than a required minimum."
nary	The archaic adjective "nary" means "not any" or "zero (0)." "Nary" is most commonly used with an indefinite article, as in "Nary a pence could be had."
natural logarithmic base	The "natural logarithmic base," also known as "Napier's Constant," (symbol: e ) is the base of the natural, hyperbolic, or Naperian logarithms. The "natural logarithmic base" is a transcendental number approximately 2.718 281 828 459. Scottish mathematician John Napier (1550-1617) published the first description of logarithms in 1614. See also "The Natural Logarithmic Base" and "e."
natural number	A natural number is a finite positive integer, e.g., 1, 2, 3, 4, 5, etc. See also "Natural Number."
naught	The pronoun "naught" means "zero (0)."
nea-	The nonstandard prefix "nea-" denotes a multiple of ten to the twenty-seventh power (10²⁷ = 1E+27 = 1,000,000,000,000,000,000,000,000,000).
nearly	The adverb "nearly" means "slightly less than the specified amount."
negative	1. The adjective and noun "negative" means "less than zero (<0)." A "negative" quantity is denoted with the prefix symbol − {minus sign}. "Negative" has the opposite polarity, direction, or meaning of "positive." In physics, the electric charge of an electron is (arbitrarily) designated as "negative."
negative	2. The adjective and noun "negative" is a logical value. "Negative" and "affirmative" or "negative" and "positive" are sometimes used as binary logic pairs.
nibble	In computer terminology, the noun "nibble" means "a set of four (4) binary units having two to the fourth power (2⁴ = 16) possible states. A single sexdecimal digit can represent the status of a nibble. A nibble is equal to four (4) bits, two (2) crumbs, or half (1/2) a byte.
nil	The noun and adjective "nil" means "zero (0)."
nine	The noun, pronoun, and adjective "nine (9)" is the standard name for "the cardinal number that follows eight (8)." "Nine" corresponds with the ordinal number "ninth (9^th)." See also Number Names, Number Notation Systems, and Integer Factors.
nineteen	The noun, pronoun, and adjective "nineteen (19)" is the standard name for "the cardinal number that follows eighteen (18)." "Nineteen" corresponds with the ordinal number "nineteenth (19^th)." See also Number Names, Number Notation Systems, and Integer Factors.
nineteenth	1. The adjective, adverb, and noun "nineteenth (19^th)" is the standard name for "the ordinal number that follows eighteenth (18^th)." "Nineteenth" corresponds with the cardinal number "nineteen (19)." See also Number Names.
nineteenth	2. The adjective and noun "nineteenth (1/19)" means "divided by nineteen (19)."
nineteenth hole	The compound noun "nineteenth (19th) hole" means "the club house of a golf course."
nineties	1. The plural noun and adjective "nineties (90s)" means "an integer multiple of ninety (90)."
nineties	2. The plural noun and adjective "nineties (90's)" means "the range of numbers at least ninety (90) but less than one hundred (100)." When referring to dates, "nineties" means "a span of ten years in which the tens (10s) digit of the year number is nine (9)."
ninetieth	1. The adjective, adverb, and noun "ninetieth (90^th)" is the standard name for "the ordinal number that follows eighty-ninth (89^th)." "Ninetieth" corresponds with the cardinal number "ninety (90)." See also Number Names.
ninetieth	2. The adjective and noun "ninetieth (1/90)" means "divided by ninety (90)."
ninety	The noun, pronoun, and adjective "ninety (90)" is the standard name for "the cardinal number that follows eighty-nine (89)." "Ninety" corresponds with the ordinal number "ninetieth (90^th)." See also Number Names, Number Notation Systems, and Integer Factors.
ninety-eight	The noun and adjective "ninety-eight (98)" is the standard name for "the cardinal number that follows ninety-seven (97)." "Ninety-eight" corresponds with the ordinal number "ninety-eighth (98^th)." See also Number Names, Number Notation Systems, and Integer Factors.
ninety-eighth	The compound adjective, adverb, and noun "ninety-eighth (98^th)" is the standard name for "the ordinal number that follows ninety-seventh (97^th)." "Ninety-eighth" corresponds with the cardinal number "ninety-eight (98)." See also Number Names.
ninety-fifth	The compound adjective, adverb, and noun "ninety-fifth (95^th)" is the standard name for "the ordinal number that follows ninety-fourth (94^th)." "Ninety-fifth" corresponds with the cardinal number "ninety-five (95)." See also Number Names.
ninety-first	The compound adjective, adverb, and noun "ninety-first (91^st)" is the standard name for "the ordinal number that follows ninetieth (90^th)." "Ninety-first" corresponds with the cardinal number "ninety-one (91)." See also Number Names.
ninety-five	The noun and adjective "ninety-five (95)" is the standard name for "the cardinal number that follows ninety-four (94)." "Ninety-five" corresponds with the ordinal number "ninety-fifth (95^th)." See also Number Names, Number Notation Systems, and Integer Factors.
ninety-four	The noun and adjective "ninety-four (94)" is the standard name for "the cardinal number that follows ninety-three (93)." "Ninety-four" corresponds with the ordinal number "ninety-fourth (94^th)." See also Number Names, Number Notation Systems, and Integer Factors.
ninety-fourth	The compound adjective, adverb, and noun "ninety-fourth (94^th)" is the standard name for "the ordinal number that follows ninety-third (93^rd or 93^d)." "Ninety-fourth" corresponds with the cardinal number "ninety-four (94)." See also Number Names.
ninety-nine	The noun and adjective "ninety-nine (99)" is the standard name for "the cardinal number that follows ninety-eight (98)." "Ninety-nine" corresponds with the ordinal number "ninety-ninth (99^th)." See also Number Names, Number Notation Systems, and Integer Factors.
ninety-ninth	The compound adjective, adverb, and noun "ninety-ninth (99^th)" is the standard name for "the ordinal number that follows ninety-eighth (98^th)." "Ninety-ninth" corresponds with the cardinal number "ninety-nine (99)." See also Number Names.
ninety-one	The noun and adjective "ninety-one (91)" is the standard name for "the cardinal number that follows ninety (90)." "Ninety-one" corresponds with the ordinal number "ninety-first (91^st)." See also Number Names, Number Notation Systems, and Integer Factors.
ninety-second	The compound adjective, adverb, and noun "ninety-second (92^nd or 92^d)" is the standard name for "the ordinal number that follows ninety-first (91^st)." "Ninety-second" corresponds with the cardinal number "ninety-two (92)." See also Number Names.
ninety-seven	The noun and adjective "ninety-seven (97)" is the standard name for "the cardinal number that follows ninety-six (96)." "Ninety-seven" corresponds with the ordinal number "ninety-seventh (97^th)." See also Number Names, Number Notation Systems, and Integer Factors.
ninety-seventh	The compound adjective, adverb, and noun "ninety-seventh (97^th)" is the standard name for "the ordinal number that follows ninety-sixth (96^th)." "Ninety-seventh" corresponds with the cardinal number "ninety-seven (97)." See also Number Names.
ninety-six	The noun and adjective "ninety-six (96)" is the standard name for "the cardinal number that follows ninety-five (95)." "Ninety-six" corresponds with the ordinal number "ninety-sixth (96^th)." See also Number Names, Number Notation Systems, and Integer Factors.
ninety-sixth	1. The compound adjective, adverb, and noun "ninety-sixth (96^th)" is the standard name for "the ordinal number that follows ninety-fifth (95^th)." "Ninety-sixth" corresponds with the cardinal number "ninety-six (96)." See also Number Names.
ninety-sixth	2. The compound adjective and noun "ninety-sixth (1/96)" means "divided by ninety-six (96)."
ninety-third	The compound adjective, adverb, and noun "ninety-third (93^rd or 93^d)" is the standard name for "the ordinal number that follows ninety-second (92^nd or 92^d)." "Ninety-third" corresponds with the cardinal number "ninety-three (93)." See also Number Names.
ninety-three	The noun and adjective "ninety-three (93)" is the standard name for "the cardinal number that follows ninety-two (92)." "Ninety-three" corresponds with the ordinal number "ninety-third (93^rd or 93^d)." See also Number Names, Number Notation Systems, and Integer Factors.
ninety-two	The noun and adjective "ninety-two (92)" is the standard name for "the cardinal number that follows ninety-one (91)." "Ninety-two" corresponds with the ordinal number "ninety-second (92^nd or 92^d)." See also Number Names, Number Notation Systems, and Integer Factors.
ninth	1. The adjective, adverb, and noun "ninth (9^th)" is the standard name for "the ordinal number that follows eighth (8^th)." "Ninth" corresponds with the cardinal number "nine (9)." See also Number Names.
ninth	2. The adjective and noun "ninth (1/9)" means "divided by nine (9)."
nix	The slang noun "nix" means "zero (0)" or "nothing." "Nix" derives from the German word "nichts" meaning "nothing."
no	The adjective, adverb, and noun "no" is a logical value. "No" and "yes" are often used as a binary logic pair.
no-	The prefix "no-" means "zero (0)."
no one	The compound pronoun "no one" means "no person" or "zero (0)."
nobody	The pronoun "nobody" means "no person" or "zero (0)." "Nobody" is a contraction of "no body."
non-	1. The prefix "non-" means "zero (0)."
nona-	The numeric prefix "nona-" means "nine (9)." This prefix is derived from the Latin ordinal number "nonus (VIIII)." See also Prefixes & Words Based On Latin Number Names and Numeric Prefixes Used In Chemistry.
nonaconta-	The prefix "nonaconta-" means "ninety (90)." See also Numeric Prefixes Used In Chemistry.
nonacta-	The prefix "nonacta-" means "nine hundred (900)." See also Numeric Prefixes Used In Chemistry.
nonadeca-	The prefix "nonadeca-" means "nineteen (19)." See also Numeric Prefixes Used In Chemistry.
nonagenarian	The noun and adjective "nonagenarian" means "between ninety (90) and one hundred (100) years of age."
nonagenary	The adjective "nonagenary" means "having ninety (90) parts."
nonagesimal	The adjective "nonagesimal" means "based on the number ninety (90)."
nonaginta-	The numeric prefix "nonaginta-" means "ninety (90)." This prefix is derived from the Latin cardinal number "nonaginta (LXXXX)."
nonagintennary	The noun and adjective "nonagintennary" means "a group of ninety (90) or a period of ninety (90) years."
nonagintennial	1. The adjective and noun "nonagintennial" means "recurring every ninety (90) years."
	2. The adjective and noun "nonagintennial" means "lasting ninety (90) years."
	3. The noun and adjective "nonagintennial" means "a ninety (90) year anniversary."
nonagintennium	The noun and adjective "nonagintennium" means "a period of ninety (90) years."
nonagintillion	The noun and adjective "nonagintillion" means multiplied by 10²⁷³ in the American number naming system, but means multiplied by 10⁵⁴⁰ in the Chuquet number naming system. See also Large Numbers.
nonagon	The noun and adjective "nonagon" means "a plane figure with nine (9) straight sides." See also "enneagon."
nonaheptaconta-	The prefix "nonaheptaconta-" means "seventy-nine (79)." See also Numeric Prefixes Used In Chemistry.
nonahexaconta-	The prefix "nonahexaconta-" means "sixty-nine (69)." See also Numeric Prefixes Used In Chemistry.
nonaicosa-	The prefix "nonaicosa-" means "twenty-nine (29)." See also Numeric Prefixes Used In Chemistry.
nonal	The adjective "nonal" means "based on the number nine (9)."
nonalia-	The prefix "nonalia-" means "nine thousand (9000)." See also Numeric Prefixes Used In Chemistry.
nonanonaconta-	The prefix "nonanonaconta-" means "ninety-nine (99)." See also Numeric Prefixes Used In Chemistry.
nonaoctaconta-	The prefix "nonaoctaconta-" means "eighty-nine (89)." See also Numeric Prefixes Used In Chemistry.
nonapentaconta-	The prefix "nonapentaconta-" means "fifty-nine (59)." See also Numeric Prefixes Used In Chemistry.
nonary	1. The adjective and noun "nonary" means "ninth (9^th) in order or importance."
nonary	2. The adjective "nonary" means "having nine (9) parts."
nonatetraconta-	The prefix "nonatetraconta-" means "forty-nine (49)." See also Numeric Prefixes Used In Chemistry.
nonatriaconta-	The prefix "nonatriaconta-" means "thirty-nine (39)." See also Numeric Prefixes Used In Chemistry.
noncuple	The verb, adjective, adverb, and noun "noncuple" means "multiply by nine (9)."
none	The pronoun "none" means "not any" or "zero (0)." "None" is a contraction of "no one."
nonet	The noun "nonet" means "a group of nine (9) members."
nonillion	The noun and adjective "nonillion" means multiplied by 10³⁰ in the American number naming system, but means multiplied by 10⁵⁴ in the Chuquet number naming system. See also Large Numbers.
nonnegative	The adjective "nonnegative" means "greater than or equal to zero (≥0)."
nonpositive	The adjective "nonpositive" means "less than or equal to zero (≤0)."
nonuple	The verb, adjective, adverb, and noun "nonuple" means "multiply by nine (9)."
nonzero	The adjective "nonzero" means "not equal to zero (≠0)."
nothing	The pronoun and noun "nothing" means "no thing" or "zero (0)." "Nothing" is a contraction of "no thing."
nought	"Nought" is an alternate spelling of the pronoun "naught" which means "zero (0)."
November	The month name "November" literally means "the ninth (9^th) month." The Roman year began on the first (1^st) day of March.
novemcentenary	1. The noun and adjective "novemcentenary" means "a group of nine hundred (900)."
	2. The noun and adjective "novemcentenary" means "a period of nine hundred (900) years."
	3. The noun and adjective "novemcentenary" means "a nine hundred (900) year anniversary."
	4. The adjective and noun "novemcentenary" means "nine hundredth (900th) in rank or order."
novemcentennial	1. The adjective and noun "novemcentennial" means "recurring every nine hundred (900) years."
	2. The adjective and noun "novemcentennial" means "lasting nine hundred (900) years."
	3. The noun and adjective "novemcentennial" means "a nine hundred (900) year anniversary."
novemcentennium	The noun and adjective "novemcentennium" means "a period of nine hundred (900) years."
novemdecennary	The noun and adjective "novemdecennary" means "a group of nineteen (19) or a period of nineteen (19) years."
novemdecennial	1. The adjective and noun "novemdecennial" means "recurring every nineteen (19) years."
	2. The adjective and noun "novemdecennial" means "lasting nineteen (19) years."
	3. The noun and adjective "novemdecennial" means "a nineteen (19) year anniversary."
novemdecennium	The noun and adjective "novemdecennium" means "a period of nineteen (19) years."
novemdecentenary	1. The noun and adjective "novemdecentenary" means "a group of one thousand nine hundred (1900)."
	2. The noun and adjective "novemdecentenary" means "a period of one thousand nine hundred (1900) years."
	3. The noun and adjective "novemdecentenary" means "a one thousand nine hundred (1900) year anniversary."
	4. The adjective and noun "novemdecentenary" means "one thousand nine hundredth (1900th) in rank or order."
novemdecentennial	1. The adjective and noun "novemdecentennial" means "recurring every one thousand nine hundred (1900) years."
	2. The adjective and noun "novemdecentennial" means "lasting one thousand nine hundred (1900) years."
	3. The noun and adjective "novemdecentennial" means "a one thousand nine hundred (1900) year anniversary."
novemdecentennium	The noun and adjective "novemdecentennium" means "a period of one thousand nine hundred (1900) years."
novemdeci-	The numeric prefix "novemdeci-" means "nineteen (19)." This prefix is taken from "novemdecim," a more regular form of the Latin cardinal number "undeviginti (XVIIII)" which literally means "one (1) from twenty (20)."
novemdecillion	The noun and adjective "novemdecillion" means multiplied by 10⁶⁰ in the American number naming system, but means multiplied by 10¹¹⁴ in the Chuquet number naming system. See also Large Numbers.
novemmillenary	1. The noun and adjective "novemmillenary" means "a group of nine thousand (9000)."
	2. The noun and adjective "novemmillenary" means "a period of nine thousand (9000) years."
	3. The noun and adjective "novemmillenary" means "a nine thousand (9000) year anniversary."
	4. The adjective and noun "novemmillenary" means "nine thousandth (9000th) in rank or order."
novemmillennial	1. The adjective and noun "novemmillennial" means "recurring every nine thousand (9000) years."
	2. The adjective and noun "novemmillennial" means "lasting nine thousand (9000) years."
	3. The noun and adjective "novemmillennial" means "a nine thousand (9000) year anniversary."
novemmillennium	The noun and adjective "novemmillennium" means "a period of nine thousand (9000) years."
novemnonaginta-	The numeric prefix "novemnonaginta-" means "ninety-nine (99)." This prefix is derived from the Latin cardinal number "novem et nonaginta (LXXXXVIIII)."
novemnonagintennary	The noun and adjective "novemnonagintennary" means "a group of ninety-nine (99) or a period of ninety-nine (99) years."
novemnonagintennial	1. The adjective and noun "novemnonagintennial" means "recurring every ninety-nine (99) years."
	2. The adjective and noun "novemnonagintennial" means "lasting ninety-nine (99) years."
	3. The noun and adjective "novemnonagintennial" means "a ninety-nine (99) year anniversary."
novemnonagintennium	The noun and adjective "novemnonagintennium" means "a period of ninety-nine (99) years."
novemnonagintillion	The noun and adjective "novemnonagintillion" means multiplied by 10³⁰⁰ in the American number naming system, but means multiplied by 10⁵⁹⁴ in the Chuquet number naming system. See also Large Numbers.
novemoctoginta-	The numeric prefix "novemoctoginta-" means "eighty-nine (89)." This prefix is derived from the Latin cardinal number "novem et octoginta (LXXXVIIII)."
novemoctogintennary	The noun and adjective "novemoctogintennary" means "a group of eighty-nine (89) or a period of eighty-nine (89) years."
novemoctogintennial	1. The adjective and noun "novemoctogintennial" means "recurring every eighty-nine (89) years."
	2. The adjective and noun "novemoctogintennial" means "lasting eighty-nine (89) years."
	3. The noun and adjective "novemoctogintennial" means "an eighty-nine (89) year anniversary."
novemoctogintennium	The noun and adjective "novemoctogintennium" means "a period of eighty-nine (89) years."
novemoctogintillion	The noun and adjective "novemoctogintillion" means multiplied by 10²⁷⁰ in the American number naming system, but means multiplied by 10⁵³⁴ in the Chuquet number naming system. See also Large Numbers.
novemquadraginta-	The numeric prefix "novemquadraginta-" means "forty-nine (49)." This prefix is derived from the Latin cardinal number "novem et quadraginta (XXXXVIIII)."
novemquadragintennary	The noun and adjective "novemquadragintennary" means "a group of forty-nine (49) or a period of forty-nine (49) years."
novemquadragintennial	1. The adjective and noun "novemquadragintennial" means "recurring every forty-nine (49) years."
	2. The adjective and noun "novemquadragintennial" means "lasting forty-nine (49) years."
	3. The noun and adjective "novemquadragintennial" means "a forty-nine (49) year anniversary."
novemquadragintennium	The noun and adjective "novemquadragintennium" means "a period of forty-nine (49) years."
novemquadragintillion	The noun and adjective "novemquadragintillion" means multiplied by 10¹⁵⁰ in the American number naming system, but means multiplied by 10²⁹⁴ in the Chuquet number naming system. See also Large Numbers.
novemquinquaginta-	The numeric prefix "novemquinquaginta-" means "fifty-nine (59)." This prefix is derived from the Latin cardinal number "novem et quinquaginta (LVIIII)."
novemquinquagintennary	The noun and adjective "novemquinquagintennary" means "a group of fifty-nine (59) or a period of fifty-nine (59) years."
novemquinquagintennial	1. The adjective and noun "novemquinquagintennial" means "recurring every fifty-nine (59) years."
	2. The adjective and noun "novemquinquagintennial" means "lasting fifty-nine (59) years."
	3. The noun and adjective "novemquinquagintennial" means "a fifty-nine (59) year anniversary."
novemquinquagintennium	The noun and adjective "novemquinquagintennium" means "a period of fifty-nine (59) years."
novemquinquagintillion	The noun and adjective "novemquinquagintillion" means multiplied by 10¹⁸⁰ in the American number naming system, but means multiplied by 10³⁵⁴ in the Chuquet number naming system. See also Large Numbers.
novemseptuaginta-	The numeric prefix "novemseptuaginta-" means "seventy-nine (79)." This prefix is derived from the Latin cardinal number "novem et septuaginta (LXXVIIII)."
novemseptuagintennary	The noun and adjective "novemseptuagintennary" means "a group of seventy-nine (79) or a period of seventy-nine (79) years."
novemseptuagintennial	1. The adjective and noun "novemseptuagintennial" means "recurring every seventy-nine (79) years."
	2. The adjective and noun "novemseptuagintennial" means "lasting seventy-nine (79) years."
	3. The noun and adjective "novemseptuagintennial" means "a seventy-nine (79) year anniversary."
novemseptuagintennium	The noun and adjective "novemseptuagintennium" means "a period of seventy-nine (79) years."
novemseptuagintillion	The noun and adjective "novemseptuagintillion" means multiplied by 10²⁴⁰ in the American number naming system, but means multiplied by 10⁴⁷⁴ in the Chuquet number naming system. See also Large Numbers.
novemsexaginta-	The numeric prefix "novemsexaginta-" means "sixty-nine (69)." This prefix is derived from the Latin cardinal number "novem et sexaginta (LXVIIII)."
novemsexagintennary	The noun and adjective "novemsexagintennary" means "a group of sixty-nine (69) or a period of sixty-nine (69) years."
novemsexagintennial	1. The adjective and noun "novemsexagintennial" means "recurring every sixty-nine (69) years."
	2. The adjective and noun "novemsexagintennial" means "lasting sixty-nine (69) years."
	3. The noun and adjective "novemsexagintennial" means "a sixty-nine (69) year anniversary."
novemsexagintennium	The noun and adjective "novemsexagintennium" means "a period of sixty-nine (69) years."
novemsexagintillion	The noun and adjective "novemsexagintillion" means multiplied by 10²¹⁰ in the American number naming system, but means multiplied by 10⁴¹⁴ in the Chuquet number naming system. See also Large Numbers.
novemtriginta-	The numeric prefix "novemtriginta-" means "thirty-nine (39)." This prefix is derived from the Latin cardinal number "novem et triginta (XXXVIIII)."
novemtrigintacentenary	1. The noun and adjective "novemtrigintacentenary" means "a group of three thousand nine hundred (3900)."
	2. The noun and adjective "novemtrigintacentenary" means "a period of three thousand nine hundred (3900) years."
	3. The noun and adjective "novemtrigintacentenary" means "a three thousand nine hundred (3900) year anniversary."
	4. The adjective and noun "novemtrigintacentenary" means "three thousand nine hundredth (3900th) in rank or order."
novemtrigintacentennial	1. The adjective and noun "novemtrigintacentennial" means "recurring every three thousand nine hundred (3900) years."
	2. The adjective and noun "novemtrigintacentennial" means "lasting three thousand nine hundred (3900) years."
	3. The noun and adjective "novemtrigintacentennial" means "a three thousand nine hundred (3900) year anniversary."
novemtrigintacentennium	The noun and adjective "novemtrigintacentennium" means "a period of three thousand nine hundred (3900) years."
novemtrigintennary	The noun and adjective "novemtrigintennary" means "a group of thirty-nine (39) or a period of thirty-nine (39) years."
novemtrigintennial	1. The adjective and noun "novemtrigintennial" means "recurring every thirty-nine (39) years."
	2. The adjective and noun "novemtrigintennial" means "lasting thirty-nine (39) years."
	3. The noun and adjective "novemtrigintennial" means "a thirty-nine (39) year anniversary."
novemtrigintennium	The noun and adjective "novemtrigintennium" means "a period of thirty-nine (39) years."
novemtrigintillion	The noun and adjective "novemtrigintillion" means multiplied by 10¹²⁰ in the American number naming system, but means multiplied by 10²³⁴ in the Chuquet number naming system. See also Large Numbers.
novemvigintennary	The noun and adjective "novemvigintennary" means "a group of twenty-nine (29) or a period of twenty-nine (29) years."
novemvigintennial	1. The adjective and noun "novemvigintennial" means "recurring every twenty-nine (29) years."
	2. The adjective and noun "novemvigintennial" means "lasting twenty-nine (29) years."
	3. The noun and adjective "novemvigintennial" means "a twenty-nine (29) year anniversary."
novemvigintennium	The noun and adjective "novemvigintennium" means "a period of twenty-nine (29) years."
novemviginti-	The numeric prefix "novemviginti-" means "twenty-nine (29)." This prefix is derived from the Latin cardinal number "novem et viginti (XXVIIII)."
novemviginticentenary	1. The noun and adjective "novemviginticentenary" means "a group of two thousand nine hundred (2900)."
	2. The noun and adjective "novemviginticentenary" means "a period of two thousand nine hundred (2900) years."
	3. The noun and adjective "novemviginticentenary" means "a two thousand nine hundred (2900) year anniversary."
	4. The adjective and noun "novemviginticentenary" means "two thousand nine hundredth (2900th) in rank or order."
novemviginticentennial	1. The adjective and noun "novemviginticentennial" means "recurring every two thousand nine hundred (2900) years."
	2. The adjective and noun "novemviginticentennial" means "lasting two thousand nine hundred (2900) years."
	3. The noun and adjective "novemviginticentennial" means "a two thousand nine hundred (2900) year anniversary."
novemviginticentennium	The noun and adjective "novemviginticentennium" means "a period of two thousand nine hundred (2900) years."
novemvigintillion	The noun and adjective "novemvigintillion" means multiplied by 10⁹⁰ in the American number naming system, but means multiplied by 10¹⁷⁴ in the Chuquet number naming system. See also Large Numbers.
novena	The noun "novena" means "a nine (9) day period of prayer."
novennary	The noun and adjective "novennary" means "a group of nine (9) or a period of nine (9) years."
novennial	1. The adjective and noun "novennial" means "recurring every nine (9) years."
	2. The adjective and noun "novennial" means "lasting nine (9) years."
	3. The noun and adjective "novennial" means "a nine (9) year anniversary."
novennium	The noun and adjective "novennium" means "a period of nine (9) years."
null	1. The noun and adjective "null" means "zero (0)", "empty", or "invalid."
null	2. The verb "null" means "to set to zero (0)."
number	1. The noun and adjective "number" means "an abstract dimensionless quantity." See also "algebraic number," "cardinal number," "complex number," "decimal number," "imaginary number," "integer number," "irrational number," "natural number," "ordinal number," "prime number," "rational number," "real number," "transcendental number," "whole number," and Number.
	2. The noun and adjective "number" means "a symbol, series of symbols, word, or series of words used to represent a "number." See also "numeral," "digit," and Number Names.
	3. The noun and adjective "number" means "a series of "digits or alphanumeric characters."
	4. The noun and adjective "number" means "the total number of individuals of discrete objects in a set." See also "count."
	5. The noun and adjective "number" means "a significantly large number of individuals of discrete objects."
	6. The verb "number" means "to assign a number to an object." Most commonly "number" means "to count." See also "enumerate."
	7. The verb "number" means "to determine the number of objects in a set." See also "count."
numberless	The adjective "numberless" means "a very large number of individuals or discrete objects."
numeracy	The noun "numeracy" means "the capacity to understand and work with numbers."
numeral	The noun and adjective "numeral" means "a single symbol or series of symbols used to represent a number." There are many modern and historical systems of numerals and number notation. In modern positional number notation systems, the Indio-Arabic numerals 0 through 9 followed by the English letters A through Z are used to represent the integers zero (0) through thirty-five (35). Roman numerals and Greek numerals are also commonly used to represent numbers.
numerate	The adjective "numerate" means "having the capacity to understand and work with numbers."
numeric	The adjective and noun "numeric" means "pertaining to numbers."
numerical	The adjective "numerical" means "of or relating to numbers."
numerous	The adjective "numerous" means "a relatively large number of individuals or discrete objects."
oct-	The numeric prefix "oct-" means "eight (8)." This prefix is derived from the Latin cardinal number "octo (VIII)."
octa-	The prefix "octa-" means "eight (8)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
octaconta-	The prefix "octaconta-" means "eighty (80)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
octacontad	The noun and adjective "octacontad" means "a group of eighty (80) members." See also Prefixes & Words Based On Greek Number Names.
octacontadi-	The prefix "octacontadi-" means "eighty-two (82)." "Octacontadi-" is an alternate form of the prefix "octacontakaidi-." See also Prefixes & Words Based On Greek Number Names.
octacontaennea-	The prefix "octacontaennea-" means "eighty-nine (89)." "Octacontaennea-" is an alternate form of the prefix "octacontakaiennea-."
octacontagon	The noun and adjective "octacontagon" means "a plain figure with eighty (80) straight sides." See also Prefixes & Words Based On Greek Number Names.
octacontagram	The noun and adjective "octacontagram" means "an interconnected star figure with eighty (80) points formed by stellating a octacontagon." See also Prefixes & Words Based On Greek Number Names.
octacontahedron	The noun and adjective "octacontahedron" means "a solid figure with eighty (80) planar faces." See also Prefixes & Words Based On Greek Number Names.
octacontahena-	The prefix "octacontahena-" means "eighty-one (81)." "Octacontahena-" is an alternate form of the prefix "octacontakaihena-." See also Prefixes & Words Based On Greek Number Names.
octacontahepta-	The prefix "octacontahepta-" means "eighty-seven (87)." "Octacontahepta-" is an alternate form of the prefix "octacontakaihepta-."
octacontahexa-	The prefix "octacontahexa-" means "eighty-six (86)." "Octacontahexa-" is an alternate form of the prefix "octacontakaihexa-."
octacontakaidi-	The prefix "octacontakaidi-" means "eighty-two (82)." See also Prefixes & Words Based On Greek Number Names.
octacontakaidigon	The noun and adjective "octacontakaidigon" means "a plain figure with eighty-two (82) straight sides." See also Prefixes & Words Based On Greek Number Names.
octacontakaidigram	The noun and adjective "octacontakaidigram" means "an interconnected star figure with eighty-two (82) points formed by stellating a octacontakaidigon." See also Prefixes & Words Based On Greek Number Names.
octacontakaidihedron	The noun and adjective "octacontakaidihedron" means "a solid figure with eighty-two (82) planar faces." See also Prefixes & Words Based On Greek Number Names.
octacontakaidyad	The noun and adjective "octacontakaidyad" means "a group of eighty-two (82) members." See also Prefixes & Words Based On Greek Number Names.
octacontakaiennea-	The prefix "octacontakaiennea-" means "eighty-nine (89)." See also Prefixes & Words Based On Greek Number Names.
octacontakaiennead	The noun and adjective "octacontakaiennead" means "a group of eighty-nine (89) members." See also Prefixes & Words Based On Greek Number Names.
octacontakaienneagon	The noun and adjective "octacontakaienneagon" means "a plain figure with eighty-nine (89) straight sides." See also Prefixes & Words Based On Greek Number Names.
octacontakaienneagram	The noun and adjective "octacontakaienneagram" means "an interconnected star figure with eighty-nine (89) points formed by stellating a octacontakaienneagon." See also Prefixes & Words Based On Greek Number Names.
octacontakaienneahedron	The noun and adjective "octacontakaienneahedron" means "a solid figure with eighty-nine (89) planar faces." See also Prefixes & Words Based On Greek Number Names.
octacontakaihena-	The prefix "octacontakaihena-" means "eighty-one (81)." See also Prefixes & Words Based On Greek Number Names.
octacontakaihenad	The noun and adjective "octacontakaihenad" means "a group of eighty-one (81) members." See also Prefixes & Words Based On Greek Number Names.
octacontakaihenagon	The noun and adjective "octacontakaihenagon" means "a plain figure with eighty-one (81) straight sides." See also Prefixes & Words Based On Greek Number Names.
octacontakaihenagram	The noun and adjective "octacontakaihenagram" means "an interconnected star figure with eighty-one (81) points formed by stellating a octacontakaihenagon." See also Prefixes & Words Based On Greek Number Names.
octacontakaihenahedron	The noun and adjective "octacontakaihenahedron" means "a solid figure with eighty-one (81) planar faces." See also Prefixes & Words Based On Greek Number Names.
octacontakaihepta-	The prefix "octacontakaihepta-" means "eighty-seven (87)." See also Prefixes & Words Based On Greek Number Names.
octacontakaiheptad	The noun and adjective "octacontakaiheptad" means "a group of eighty-seven (87) members." See also Prefixes & Words Based On Greek Number Names.
octacontakaiheptagon	The noun and adjective "octacontakaiheptagon" means "a plain figure with eighty-seven (87) straight sides." See also Prefixes & Words Based On Greek Number Names.
octacontakaiheptagram	The noun and adjective "octacontakaiheptagram" means "an interconnected star figure with eighty-seven (87) points formed by stellating a octacontakaiheptagon." See also Prefixes & Words Based On Greek Number Names.
octacontakaiheptahedron	The noun and adjective "octacontakaiheptahedron" means "a solid figure with eighty-seven (87) planar faces." See also Prefixes & Words Based On Greek Number Names.
octacontakaihexa-	The prefix "octacontakaihexa-" means "eighty-six (86)." See also Prefixes & Words Based On Greek Number Names.
octacontakaihexad	The noun and adjective "octacontakaihexad" means "a group of eighty-six (86) members." See also Prefixes & Words Based On Greek Number Names.
octacontakaihexagon	The noun and adjective "octacontakaihexagon" means "a plain figure with eighty-six (86) straight sides." See also Prefixes & Words Based On Greek Number Names.
octacontakaihexagram	The noun and adjective "octacontakaihexagram" means "an interconnected star figure with eighty-six (86) points formed by stellating a octacontakaihexagon." See also Prefixes & Words Based On Greek Number Names.
octacontakaihexahedron	The noun and adjective "octacontakaihexahedron" means "a solid figure with eighty-six (86) planar faces." See also Prefixes & Words Based On Greek Number Names.
octacontakaiocta-	The prefix "octacontakaiocta-" means "eighty-eight (88)." See also Prefixes & Words Based On Greek Number Names.
octacontakaioctad	The noun and adjective "octacontakaioctad" means "a group of eighty-eight (88) members." See also Prefixes & Words Based On Greek Number Names.
octacontakaioctagon	The noun and adjective "octacontakaioctagon" means "a plain figure with eighty-eight (88) straight sides." See also Prefixes & Words Based On Greek Number Names.
octacontakaioctagram	The noun and adjective "octacontakaioctagram" means "an interconnected star figure with eighty-eight (88) points formed by stellating a octacontakaioctagon." See also Prefixes & Words Based On Greek Number Names.
octacontakaioctahedron	The noun and adjective "octacontakaioctahedron" means "a solid figure with eighty-eight (88) planar faces." See also Prefixes & Words Based On Greek Number Names.
octacontakaipenta-	The prefix "octacontakaipenta-" means "eighty-five (85)." See also Prefixes & Words Based On Greek Number Names.
octacontakaipentad	The noun and adjective "octacontakaipentad" means "a group of eighty-five (85) members." See also Prefixes & Words Based On Greek Number Names.
octacontakaipentagon	The noun and adjective "octacontakaipentagon" means "a plain figure with eighty-five (85) straight sides." See also Prefixes & Words Based On Greek Number Names.
octacontakaipentagram	The noun and adjective "octacontakaipentagram" means "an interconnected star figure with eighty-five (85) points formed by stellating a octacontakaipentagon." See also Prefixes & Words Based On Greek Number Names.
octacontakaipentahedron	The noun and adjective "octacontakaipentahedron" means "a solid figure with eighty-five (85) planar faces." See also Prefixes & Words Based On Greek Number Names.
octacontakaitetra-	The prefix "octacontakaitetra-" means "eighty-four (84)." See also Prefixes & Words Based On Greek Number Names.
octacontakaitetrad	The noun and adjective "octacontakaitetrad" means "a group of eighty-four (84) members." See also Prefixes & Words Based On Greek Number Names.
octacontakaitetragon	The noun and adjective "octacontakaitetragon" means "a plain figure with eighty-four (84) straight sides." See also Prefixes & Words Based On Greek Number Names.
octacontakaitetragram	The noun and adjective "octacontakaitetragram" means "an interconnected star figure with eighty-four (84) points formed by stellating a octacontakaitetragon." See also Prefixes & Words Based On Greek Number Names.
octacontakaitetrahedron	The noun and adjective "octacontakaitetrahedron" means "a solid figure with eighty-four (84) planar faces." See also Prefixes & Words Based On Greek Number Names.
octacontakaitri-	The prefix "octacontakaitri-" means "eighty-three (83)." See also Prefixes & Words Based On Greek Number Names.
octacontakaitriad	The noun and adjective "octacontakaitriad" means "a group of eighty-three (83) members." See also Prefixes & Words Based On Greek Number Names.
octacontakaitrigon	The noun and adjective "octacontakaitrigon" means "a plain figure with eighty-three (83) straight sides." See also Prefixes & Words Based On Greek Number Names.
octacontakaitrigram	The noun and adjective "octacontakaitrigram" means "an interconnected star figure with eighty-three (83) points formed by stellating a octacontakaitrigon." See also Prefixes & Words Based On Greek Number Names.
octacontakaitrihedron	The noun and adjective "octacontakaitrihedron" means "a solid figure with eighty-three (83) planar faces." See also Prefixes & Words Based On Greek Number Names.
octacontaocta-	The prefix "octacontaocta-" means "eighty-eight (88)." "Octacontaocta-" is an alternate form of the prefix "octacontakaiocta-." See also Prefixes & Words Based On Greek Number Names.
octacontapenta-	The prefix "octacontapenta-" means "eighty-five (85)." "Octacontapenta-" is an alternate form of the prefix "octacontakaipenta-."
octacontatetra-	The prefix "octacontatetra-" means "eighty-four (84)." "Octacontatetra-" is an alternate form of the prefix "octacontakaitetra-."
octacontatri-	The prefix "octacontatri-" means "eighty-three (83)." "Octacontatri-" is an alternate form of the prefix "octacontakaitri-."
octacta-	The prefix "octacta-" means "eight hundred (800)." See also Numeric Prefixes Used In Chemistry.
octad	The noun and adjective "octad" means "a group of eight (8) members." See also Prefixes & Words Based On Greek Number Names.
octadeca-	The prefix "octadeca-" means "eighteen (18)." See also Numeric Prefixes Used In Chemistry.
octagon	The noun and adjective "octagon" means "a plain figure with eight (8) straight sides." See also Prefixes & Words Based On Greek Number Names.
octagram	1. The noun and adjective "octagram" means "an interconnected star figure with eight (8) points formed by stellating a octagon." See also Prefixes & Words Based On Greek Number Names.
octagram	2. The noun "octagram" means "a word or character sequence consisting of eight (8) characters."
octahedron	The noun and adjective "octahedron" means "a solid figure with eight (8) planar faces." See also Prefixes & Words Based On Greek Number Names.
octaheptaconta-	The prefix "octaheptaconta-" means "seventy-eight (78)." See also Numeric Prefixes Used In Chemistry.
octahexaconta-	The prefix "octahexaconta-" means "sixty-eight (68)." See also Numeric Prefixes Used In Chemistry.
octaicosa-	The prefix "octaicosa-" means "twenty-eight (28)." See also Numeric Prefixes Used In Chemistry.
octakaideca-	The prefix "octakaideca-" means "eighteen (18)." See also Prefixes & Words Based On Greek Number Names.
octakaidecad	The noun and adjective "octakaidecad" means "a group of eighteen (18) members." See also Prefixes & Words Based On Greek Number Names.
octakaidecagon	The noun and adjective "octakaidecagon" means "a plain figure with eighteen (18) straight sides." See also Prefixes & Words Based On Greek Number Names.
octakaidecagram	The noun and adjective "octakaidecagram" means "an interconnected star figure with eighteen (18) points formed by stellating a octakaidecagon." See also Prefixes & Words Based On Greek Number Names.
octakaidecahedron	The noun and adjective "octakaidecahedron" means "a solid figure with eighteen (18) planar faces." See also Prefixes & Words Based On Greek Number Names.
octal	The adjective "octal" means "based on the number eight (8)." See also base eight and Base Number Notation. See also Prefixes & Words Based On Greek Number Names.
octalia-	The prefix "octalia-" means "eight thousand (8000)." See also Numeric Prefixes Used In Chemistry.
octameter	The noun "octameter" means "a verse consisting of eight (8) metrical feet."
octangle	The noun "octangle" means "a plane figure with eight (8) vertices."
octanonaconta-	The prefix "octanonaconta-" means "ninety-eight (98)." See also Numeric Prefixes Used In Chemistry.
octaoctaconta-	The prefix "octaoctaconta-" means "eighty-eight (88)." See also Numeric Prefixes Used In Chemistry.
octapentaconta-	The prefix "octapentaconta-" means "fifty-eight (58)." See also Numeric Prefixes Used In Chemistry.
octatetraconta-	The prefix "octatetraconta-" means "forty-eight (48)." See also Numeric Prefixes Used In Chemistry.
octatriaconta-	The prefix "octatriaconta-" means "thirty-eight (38)." See also Numeric Prefixes Used In Chemistry.
octaval	The adjective "octaval" means "based on the number eight (8)."
octave	1. The noun "octave" means "a set of eight (8)."
	2. The noun "octave" means "a religious observance of eight (8) days beginning with a feast day."
	3. The noun "octave" means "a stanza of eight (8) lines."
	4. The noun and adjective "octave" means "a frequency ratio of two (2)."
octavo	The noun "octavo (8vo)" means "a book with leaves printed on one eighth (1/8) of the printer sheet."
octennary	The noun and adjective "octennary" means "a group of eight (8) or a period of eight (8) years."
octennial	1. The adjective and noun "octennial" means "recurring every eight (8) years."
	2. The adjective and noun "octennial" means "lasting eight (8) years."
	3. The noun and adjective "octennial" means "an eight (8) year anniversary."
octennium	The noun and adjective "octennium" means "a period of eight (8) years."
octet	The noun "octet" means "a group of eight (8) members."
octilateral	The adjective "octilateral" means "having eight (8) sides."
octillion	The noun and adjective "octillion" means multiplied by 10²⁷ in the American number naming system, but means multiplied by 10⁴⁸ in the Chuquet number naming system. See also Large Numbers.
October	The month name "October" literally means "the eighth (8^th) month." The Roman year began on the first (1^st) day of March.
octocentenary	1. The noun and adjective "octocentenary" means "a group of eight hundred (800)."
	2. The noun and adjective "octocentenary" means "a period of eight hundred (800) years."
	3. The noun and adjective "octocentenary" means "an eight hundred (800) year anniversary."
	4. The adjective and noun "octocentenary" means "eight hundredth (800th) in rank or order."
octocentennial	1. The adjective and noun "octocentennial" means "recurring every eight hundred (800) years."
	2. The adjective and noun "octocentennial" means "lasting eight hundred (800) years."
	3. The noun and adjective "octocentennial" means "an eight hundred (800) year anniversary."
octocentennium	The noun and adjective "octocentennium" means "a period of eight hundred (800) years."
octodecennary	The noun and adjective "octodecennary" means "a group of eighteen (18) or a period of eighteen (18) years."
octodecennial	1. The adjective and noun "octodecennial" means "recurring every eighteen (18) years."
	2. The adjective and noun "octodecennial" means "lasting eighteen (18) years."
	3. The noun and adjective "octodecennial" means "an eighteen (18) year anniversary."
octodecennium	The noun and adjective "octodecennium" means "a period of eighteen (18) years."
octodecentenary	1. The noun and adjective "octodecentenary" means "a group of one thousand eight hundred (1800)."
	2. The noun and adjective "octodecentenary" means "a period of one thousand eight hundred (1800) years."
	3. The noun and adjective "octodecentenary" means "a one thousand eight hundred (1800) year anniversary."
	4. The adjective and noun "octodecentenary" means "one thousand eight hundredth (1800th) in rank or order."
octodecentennial	1. The adjective and noun "octodecentennial" means "recurring every one thousand eight hundred (1800) years."
	2. The adjective and noun "octodecentennial" means "lasting one thousand eight hundred (1800) years."
	3. The noun and adjective "octodecentennial" means "a one thousand eight hundred (1800) year anniversary."
octodecentennium	The noun and adjective "octodecentennium" means "a period of one thousand eight hundred (1800) years."
octodeci-	The numeric prefix "octodeci-" means "eighteen (18)." This prefix is taken from "octodecim," a more regular form of the Latin cardinal number "duodeviginti (XVIII)" which literally means "two (2) from twenty (20)."
octodecicycle	The noun, adjective, and verb "octodecicycle" means "having eighteen (18) wheels." See also "eighteen-wheeler (18-wheeler)" and "semi."
octodecillion	The noun and adjective "octodecillion" means multiplied by 10⁵⁷ in the American number naming system, but means multiplied by 10¹⁰⁸ in the Chuquet number naming system. See also Large Numbers.
octogenarian	The noun and adjective "octogenarian" means "between eighty (80) and ninety (90) years of age."
octogenary	The adjective "octogenary" means "having eighty (80) parts."
octogesimal	The adjective "octogesimal" means "based on the number eighty (80)."
octoginta-	The numeric prefix "octoginta-" means "eighty (80)." This prefix is derived from the Latin cardinal number "octoginta (LXXX)."
octogintennary	The noun and adjective "octogintennary" means "a group of eighty (80) or a period of eighty (80) years."
octogintennial	1. The adjective and noun "octogintennial" means "recurring every eighty (80) years."
	2. The adjective and noun "octogintennial" means "lasting eighty (80) years."
	3. The noun and adjective "octogintennial" means "an eighty (80) year anniversary."
octogintennium	The noun and adjective "octogintennium" means "a period of eighty (80) years."
octogintillion	The noun and adjective "octogintillion" means multiplied by 10²⁴³ in the American number naming system, but means multiplied by 10⁴⁸⁰ in the Chuquet number naming system. See also Large Numbers.
octohedron	The noun "octohedron" means "a solid figure with eight (8) faces."
octomillenary	1. The noun and adjective "octomillenary" means "a group of eight thousand (8000)."
	2. The noun and adjective "octomillenary" means "a period of eight thousand (8000) years."
	3. The noun and adjective "octomillenary" means "an eight thousand (8000) year anniversary."
	4. The adjective and noun "octomillenary" means "eight thousandth (8000th) in rank or order."
octomillennial	1. The adjective and noun "octomillennial" means "recurring every eight thousand (8000) years."
	2. The adjective and noun "octomillennial" means "lasting eight thousand (8000) years."
	3. The noun and adjective "octomillennial" means "an eight thousand (8000) year anniversary."
octomillennium	The noun and adjective "octomillennium" means "a period of eight thousand (8000) years."
octonary	1. The adjective and noun "octonary" means "eighth (8^th) in order or importance."
octonary	2. The adjective "octonary" means "having eight (8) parts."
octononaginta-	The numeric prefix "octononaginta-" means "ninety-eight (98)." This prefix is derived from the Latin cardinal number "octo et nonaginta (LXXXXVIII)."
octononagintennary	The noun and adjective "octononagintennary" means "a group of ninety-eight (98) or a period of ninety-eight (98) years."
octononagintennial	1. The adjective and noun "octononagintennial" means "recurring every ninety-eight (98) years."
	2. The adjective and noun "octononagintennial" means "lasting ninety-eight (98) years."
	3. The noun and adjective "octononagintennial" means "a ninety-eight (98) year anniversary."
octononagintennium	The noun and adjective "octononagintennium" means "a period of ninety-eight (98) years."
octononagintillion	The noun and adjective "octononagintillion" means multiplied by 10²⁹⁷ in the American number naming system, but means multiplied by 10⁵⁸⁸ in the Chuquet number naming system. See also Large Numbers.
octooctoginta-	The numeric prefix "octooctoginta-" means "eighty-eight (88)." This prefix is derived from the Latin cardinal number "octo et octoginta (LXXXVIII)."
octooctogintennary	The noun and adjective "octooctogintennary" means "a group of eighty-eight (88) or a period of eighty-eight (88) years."
octooctogintennial	1. The adjective and noun "octooctogintennial" means "recurring every eighty-eight (88) years."
	2. The adjective and noun "octooctogintennial" means "lasting eighty-eight (88) years."
	3. The noun and adjective "octooctogintennial" means "an eighty-eight (88) year anniversary."
octooctogintennium	The noun and adjective "octooctogintennium" means "a period of eighty-eight (88) years."
octooctogintillion	The noun and adjective "octooctogintillion" means multiplied by 10²⁶⁷ in the American number naming system, but means multiplied by 10⁵²⁸ in the Chuquet number naming system. See also Large Numbers.
octoquadraginta-	The numeric prefix "octoquadraginta-" means "forty-eight (48)." This prefix is derived from the Latin cardinal number "octo et quadraginta (XXXXVIII)."
octoquadragintennary	The noun and adjective "octoquadragintennary" means "a group of forty-eight (48) or a period of forty-eight (48) years."
octoquadragintennial	1. The adjective and noun "octoquadragintennial" means "recurring every forty-eight (48) years."
	2. The adjective and noun "octoquadragintennial" means "lasting forty-eight (48) years."
	3. The noun and adjective "octoquadragintennial" means "a forty-eight (48) year anniversary."
octoquadragintennium	The noun and adjective "octoquadragintennium" means "a period of forty-eight (48) years."
octoquadragintillion	The noun and adjective "octoquadragintillion" means multiplied by 10¹⁴⁷ in the American number naming system, but means multiplied by 10²⁸⁸ in the Chuquet number naming system. See also Large Numbers.
octoquinquaginta-	The numeric prefix "octoquinquaginta-" means "fifty-eight (58)." This prefix is derived from the Latin cardinal number "octo et quinquaginta (LVIII)."
octoquinquagintennary	The noun and adjective "octoquinquagintennary" means "a group of fifty-eight (58) or a period of fifty-eight (58) years."
octoquinquagintennial	1. The adjective and noun "octoquinquagintennial" means "recurring every fifty-eight (58) years."
	2. The adjective and noun "octoquinquagintennial" means "lasting fifty-eight (58) years."
	3. The noun and adjective "octoquinquagintennial" means "a fifty-eight (58) year anniversary."
octoquinquagintennium	The noun and adjective "octoquinquagintennium" means "a period of fifty-eight (58) years."
octoquinquagintillion	The noun and adjective "octoquinquagintillion" means multiplied by 10¹⁷⁷ in the American number naming system, but means multiplied by 10³⁴⁸ in the Chuquet number naming system. See also Large Numbers.
octoseptuaginta-	The numeric prefix "octoseptuaginta-" means "seventy-eight (78)." This prefix is derived from the Latin cardinal number "octo et septuaginta (LXXVIII)."
octoseptuagintennary	The noun and adjective "octoseptuagintennary" means "a group of seventy-eight (78) or a period of seventy-eight (78) years."
octoseptuagintennial	1. The adjective and noun "octoseptuagintennial" means "recurring every seventy-eight (78) years."
	2. The adjective and noun "octoseptuagintennial" means "lasting seventy-eight (78) years."
	3. The noun and adjective "octoseptuagintennial" means "a seventy-eight (78) year anniversary."
octoseptuagintennium	The noun and adjective "octoseptuagintennium" means "a period of seventy-eight (78) years."
octoseptuagintillion	The noun and adjective "octoseptuagintillion" means multiplied by 10²³⁷ in the American number naming system, but means multiplied by 10⁴⁶⁸ in the Chuquet number naming system. See also Large Numbers.
octosexaginta-	The numeric prefix "octosexaginta-" means "sixty-eight (68)." This prefix is derived from the Latin cardinal number "octo et sexaginta (LXVIII)."
octosexagintennary	The noun and adjective "octosexagintennary" means "a group of sixty-eight (68) or a period of sixty-eight (68) years."
octosexagintennial	1. The adjective and noun "octosexagintennial" means "recurring every sixty-eight (68) years."
	2. The adjective and noun "octosexagintennial" means "lasting sixty-eight (68) years."
	3. The noun and adjective "octosexagintennial" means "a sixty-eight (68) year anniversary."
octosexagintennium	The noun and adjective "octosexagintennium" means "a period of sixty-eight (68) years."
octosexagintillion	The noun and adjective "octosexagintillion" means multiplied by 10²⁰⁷ in the American number naming system, but means multiplied by 10⁴⁰⁸ in the Chuquet number naming system. See also Large Numbers.
octotriginta-	The numeric prefix "octotriginta-" means "thirty-eight (38)." This prefix is derived from the Latin cardinal number "octo et triginta (XXXVIII)."
octotrigintacentenary	1. The noun and adjective "octotrigintacentenary" means "a group of three thousand eight hundred (3800)."
	2. The noun and adjective "octotrigintacentenary" means "a period of three thousand eight hundred (3800) years."
	3. The noun and adjective "octotrigintacentenary" means "a three thousand eight hundred (3800) year anniversary."
	4. The adjective and noun "octotrigintacentenary" means "three thousand eight hundredth (3800th) in rank or order."
octotrigintacentennial	1. The adjective and noun "octotrigintacentennial" means "recurring every three thousand eight hundred (3800) years."
	2. The adjective and noun "octotrigintacentennial" means "lasting three thousand eight hundred (3800) years."
	3. The noun and adjective "octotrigintacentennial" means "a three thousand eight hundred (3800) year anniversary."
octotrigintacentennium	The noun and adjective "octotrigintacentennium" means "a period of three thousand eight hundred (3800) years."
octotrigintennary	The noun and adjective "octotrigintennary" means "a group of thirty-eight (38) or a period of thirty-eight (38) years."
octotrigintennial	1. The adjective and noun "octotrigintennial" means "recurring every thirty-eight (38) years."
	2. The adjective and noun "octotrigintennial" means "lasting thirty-eight (38) years."
	3. The noun and adjective "octotrigintennial" means "a thirty-eight (38) year anniversary."
octotrigintennium	The noun and adjective "octotrigintennium" means "a period of thirty-eight (38) years."
octotrigintillion	The noun and adjective "octotrigintillion" means multiplied by 10¹¹⁷ in the American number naming system, but means multiplied by 10²²⁸ in the Chuquet number naming system. See also Large Numbers.
octovigintennary	The noun and adjective "octovigintennary" means "a group of twenty-eight (28) or a period of twenty-eight (28) years."
octovigintennial	1. The adjective and noun "octovigintennial" means "recurring every twenty-eight (28) years."
	2. The adjective and noun "octovigintennial" means "lasting twenty-eight (28) years."
	3. The noun and adjective "octovigintennial" means "a twenty-eight (28) year anniversary."
octovigintennium	The noun and adjective "octovigintennium" means "a period of twenty-eight (28) years."
octoviginti-	The numeric prefix "octoviginti-" means "twenty-eight (28)." This prefix is derived from the Latin cardinal number "octo et viginti (XXVIII)."
octoviginticentenary	1. The noun and adjective "octoviginticentenary" means "a group of two thousand eight hundred (2800)."
	2. The noun and adjective "octoviginticentenary" means "a period of two thousand eight hundred (2800) years."
	3. The noun and adjective "octoviginticentenary" means "a two thousand eight hundred (2800) year anniversary."
	4. The adjective and noun "octoviginticentenary" means "two thousand eight hundredth (2800th) in rank or order."
octoviginticentennial	1. The adjective and noun "octoviginticentennial" means "recurring every two thousand eight hundred (2800) years."
	2. The adjective and noun "octoviginticentennial" means "lasting two thousand eight hundred (2800) years."
	3. The noun and adjective "octoviginticentennial" means "a two thousand eight hundred (2800) year anniversary."
octoviginticentennium	The noun and adjective "octoviginticentennium" means "a period of two thousand eight hundred (2800) years."
octovigintillion	The noun and adjective "octovigintillion" means multiplied by 10⁸⁷ in the American number naming system, but means multiplied by 10¹⁶⁸ in the Chuquet number naming system. See also Large Numbers.
octuple	The verb, adjective, adverb, and noun "octuple" means "multiply by eight (8)."
octuplet	The noun and adjective "octuplet" means "one of eight (8) siblings born together" or "one of eight (8) very similar things."
olympiad	The noun "olympiad" means "a period of four (4) years."
once	The adverb "once" means "one (1) time."
one	The noun, pronoun, and adjective "one (1)" is the standard name for "the cardinal number that represents unity." "One" corresponds with the ordinal number "first (1^st)." See also Number Names and Number Notation Systems.
one eighth	The compound noun, pronoun, and adjective "one eighth (1/8 = 0.125)" is the standard name for "the rational fraction equal to one (1) divided by eight (8)." "One eighth" equals "two to the negative third power (2^-3 = 1/8 = 0.125)." "One eighth" is the third Eye of Horus fraction. See also Integer Powers of Two.
one fifth	The compound noun, pronoun, and adjective "one fifth (1/5 = 0.200)" is the standard name for "the rational fraction equal to one (1) divided by five (5)."
one fourth	The compound noun, pronoun, and adjective "one fourth (1/4 = 0.250)" is the standard name for "the rational fraction equal to one (1) divided by four (4)." "One fourth" equals "two to the negative second power (2^-2 = 1/4 = 0.250)." "One fourth" is the second Eye of Horus fraction. See also Integer Powers of Two.
one half	The compound noun, pronoun, and adjective "one half (1/2 = 0.500)" is the standard name for "the rational fraction equal to one (1) divided by two (2)." "One half" equals "two to the negative first power (2^-1 = 1/2 = 0.500)." "One half" is the first Eye of Horus fraction. See also Integer Powers of Two.
one hundred	The compound noun, pronoun, and adjective "one hundred (100)" is the standard name for "the cardinal number that follows ninety-nine (99)." "One hundred" equals "ten to the second power (10² = 1E+02 = 100)." "One hundred" corresponds with the ordinal number "one hundredth (100^th)." See also Standard Number Names, Number Notation Systems, and Integer Factors.
one hundred million	The compound noun and adjective "one hundred million (100,000,000)" is the standard name for "the cardinal number that equals ten to the eighth power (10⁸ = 1E+08 = 100,000,000)." See also Standard Number Names.
one hundred thousand	The compound noun and adjective "one hundred thousand (100,000)" is the standard name for "the cardinal number that equals ten to the fifth power (10⁵ = 1E+05 = 100,000)." See also Standard Number Names.
one hundredth	The compound adjective, adverb, and noun "one hundredth (100^th)" is the standard name for "the ordinal number that follows ninety-ninth (99^th)." "One hundredth" corresponds with the cardinal number "one hundred (100)." See also Standard Number Names.
one million	The compound noun and adjective "one million (1,000,000)" is the standard name for "the cardinal number that equals ten to the sixth power (10⁶ = 1E+06 = 1,000,000)." See also Number Names and Integer Powers of One Thousand.
one ninth	The compound noun, pronoun, and adjective "one ninth (1/9)" is the standard name for "the rational fraction equal to one (1) divided by nine (9)."
one one-hundred-millionth	The compound noun and adjective "one one-hundred-millionth (1/100,000,000 = 0.000 000 010)" is the standard name for "the rational fraction that equals "ten to the negative eighth power (10^-8 = 1E-08 = 0.000 000 010)." See also Number Names.
one one-hundredth	The compound noun and adjective "one one-hundredth (1/100 = 0.010)" is the standard name for "the rational fraction that equals "ten to the negative second power (10^-2 = 1E-02 = 0.010)." See also Number Names.
one one-hundred-thousandth	The compound noun and adjective "one one-hundred-thousandth (1/100,000 = 0.000 010)" is the standard name for "the rational fraction that equals "ten to the negative fifth power (10^-5 = 1E-05 = 0.000 010)." See also Number Names.
one one-millionth	The compound noun and adjective "one one-millionth (1/1,000,000 = 0.000 001)" is the standard name for "the rational fraction that equals "ten to the negative sixth power (10^-6 = 1E-06 = 0.000 001)." See also Number Names and Integer Powers of One Thousand.
one one-thousandth	The compound noun and adjective "one one-thousandth (1/1,000 = 0.001)" is the standard name for "the rational fraction that equals "ten to the negative third power (10^-3 = 1E-03 = 0.001)." See also Number Names and Integer Powers of One Thousand.
one quarter	The compound noun, pronoun, and adjective "one quarter" is an alternate name for "the rational fraction one fourth (1/4 = 0.250)." See also Integer Powers of Two.
one seventh	The compound noun, pronoun, and adjective "one seventh (1/7)" is the standard name for "the rational fraction equal to one (1) divided by seven (7)."
one sixteenth	The compound noun, pronoun, and adjective "one sixteenth (1/16 = 0.062 500)" is the standard name for "the rational fraction equal to one (1) divided by sixteen (16)." "One sixteenth" equals "two to the negative fourth power (2^-4 = 1/16 = 0.062 500)." "One sixteenth" is the fourth Eye of Horus fraction. See also Integer Powers of Two.
one sixth	The compound noun, pronoun, and adjective "one sixth (1/6)" is the standard name for "the rational fraction equal to one (1) divided by six (6)."
one sixty-fourth	The compound noun, pronoun, and adjective "one sixty-fourth (1/64 = 0.015 625)" is the standard name for "the rational fraction equal to one (1) divided by sixty-four (64)." "One sixty-fourth" equals "two to the negative sixth power (2^-6 = 1/64 = 0.015 625)." "One sixty-fourth" is the sixth Eye of Horus fraction. See also Integer Powers of Two.
one ten-millionth	The compound noun and adjective "one ten-millionth (1/10,000,000 = 0.000 000 100)" is the standard name for "the rational fraction that equals "ten to the negative seventh power (10^-7 = 1E-07 = 0.000 000 100)." See also Number Names.
one tenth	The compound noun and adjective "one tenth (1/10 = 0.100)" is the standard name for "the rational fraction that equals "ten to the negative first power (10^-1 = 1E-01 = 0.100)." See also Number Names.
one ten-thousandth	The compound noun and adjective "one ten-thousandth (1/10,000 = 0.000 100)" is the standard name for "the rational fraction that equals "ten to the negative fourth power (10^-4 = 1E-04 = 0.000 100)." See also Number Names.
one third	The compound noun, pronoun, and adjective "one third (1/3)" is the standard name for "the rational fraction equal to one (1) divided by three (3)."
one thirty-second	The compound noun, pronoun, and adjective "one thirty-second (1/32 = 0.031 250)" is the standard name for "the rational fraction equal to one (1) divided by thirty-two (32)." "One thirty-second" equals "two to the negative fifth power (2^-5 = 1/32 = 0.031 250)." "One thirty-second" is the fifth Eye of Horus fraction. See also Integer Powers of Two.
one thousand	The compound noun and adjective "one thousand (1,000)" is the standard name for "the cardinal number that equals ten to the third power (10³ = 1E+03 = 1,000)." See also Number Names, Integer Factors, and Integer Powers of One Thousand.
one-hundred-millionth	The compound adjective and noun "one-hundred-millionth (1/100,000,000 = 0.000 000 010)" means "divided by one hundred million (100,000,000)." See also Number Names.
one-hundredth	The compound adjective and noun "one-hundredth (1/100 = 0.010)" means "divided by one hundred (100)." See also Number Names.
one-hundred-thousandth	The compound adjective and noun "one-hundred-thousandth (1/100,000 = 0.000 010)" means "divided by one hundred thousand (100,000)." See also Number Names.
one-millionth	The compound adjective and noun "one-millionth (1/1,000,000 = 0.000 001)" means "divided by one million (1,000,000)." See also Number Names.
ones	The plural noun and adjective "ones (1s)" means "an integer multiple of one (1)." See also "units."
one-thousandth	The compound adjective and noun "one-thousandth (1/1,000 = 0.001)" means "divided by one thousand (1,000)." See also Number Names.
only	1. The adjective and adverb "only" means "one (1) alone."
only	2. The adjective "only" means "exactly the specified amount or number."
order of magnitude	The expression "order of magnitude" (properly "decimal order of magnitude") means "an exponential range of ten to one (10:1)." "Two orders of magnitude" means "an exponential range of one hundred to one (100:1)," etc.
ordinal number	An ordinal number is an adjective that describes the order or numerical position of an object, e.g., first, second, third, fourth, fifth, sixth, seventh, etc. See also "Ordinal Number" and Number Names.
original	The adjective "original" means "first (1^st)."
p-	The metric prefix symbol p- (metric prefix: "pico-" ) denotes a multiple of ten to the negative twelfth power (10^-12 = 1E-12 = 0.000 000 000 001) as defined by Le Système International d'Unités (SI).
P-	The metric prefix symbol P- (metric prefix: "peta-" ) denotes a multiple of ten to the fifteenth power (10¹⁵ = 1E+15 = 1,000,000,000,000,000) as defined by Le Système International d'Unités (SI).
pair	The noun "pair" means "a set of two (2)."
particular	The adjective and noun "particular" means "of, relating to, or being a single being or thing."
parts per billion	In North American use, the compound noun "parts per billion" (symbol: ppb ) means "a relative portion represented as a ratio to ten to the negative ninth power (10^-9 = 1E-09 = 0.000 000 001) of the whole, usually by mass."
parts per million	The compound noun "parts per million" (symbol: ppm ) means "a relative portion represented as a ratio to one one-millionth (1/1,000,000 = 0.000 001) of the whole, usually by mass."
parts per quadrillion	In North American use, the compound noun "parts per quadrillion" (symbol: ppq ) means "a relative portion represented as a ratio to ten to the negative fifteenth power (10^-15 = 1E-15 = 0.000 000 000 000 001) of the whole, usually by mass."
parts per thousand	The compound noun "parts per thousand" (symbol: ppt ) means "a relative portion represented as a ratio to one one-thousandth (1/1,000 = 0. 001) of the whole, usually by mass."
parts per trillion	In North American use, the compound noun "parts per trillion" (symbol: ppt ) means "a relative portion represented as a ratio to ten to the negative twelfth power (10^-12 = 1E-12 = 0.000 000 000 001) of the whole, usually by mass."
pebi-	The binary prefix "pebi-" (prefix symbol: Pi- ) denotes a multiple of two to the fiftieth power (2⁵⁰ = 1,125,899,906,842,624) as defined by the International Electrotechnical Commission (IEC). See also "petabinary."
pebin	The adjective and noun "pebin" means "two to the fiftieth power (2⁵⁰ = 1,125,899,906,842,624)." See also "petabinary" and "pebi-."
pendecagon	The noun "pendecagon" means "a plane figure with fifteen (15) sides."
pendecahedron	The noun "pendecahedron" means "a solid figure with fifteen (15) faces."
penta-	The prefix "penta-" means "five (5)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
pentacle	The noun and adjective "pentacle" means "a pentagram inscribed in a circle."
pentaconta-	The prefix "pentaconta-" means "fifty (50)." See also Prefixes & Words Based On Greek Number Names and Numeric Prefixes Used In Chemistry.
pentacontad	The noun and adjective "pentacontad" means "a group of fifty (50) members." See also Prefixes & Words Based On Greek Number Names.
pentacontadi-	The prefix "pentacontadi-" means "fifty-two (52)." "Pentacontadi-" is an alternate form of the prefix "pentacontakaidi-." See also Prefixes & Words Based On Greek Number Names.
pentacontaennea-	The prefix "pentacontaennea-" means "fifty-nine (59)." "Pentacontaennea-" is an alternate form of the prefix "pentacontakaiennea-."
pentacontagon	The noun and adjective "pentacontagon" means "a plain figure with fifty (50) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentacontagram	The noun and adjective "pentacontagram" means "an interconnected star figure with fifty (50) points formed by stellating a pentacontagon." See also Prefixes & Words Based On Greek Number Names.
pentacontahedron	The noun and adjective "pentacontahedron" means "a solid figure with fifty (50) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentacontahena-	The prefix "pentacontahena-" means "fifty-one (51)." "Pentacontahena-" is an alternate form of the prefix "pentacontakaihena-." See also Prefixes & Words Based On Greek Number Names.
pentacontahepta-	The prefix "pentacontahepta-" means "fifty-seven (57)." "Pentacontahepta-" is an alternate form of the prefix "pentacontakaihepta-."
pentacontahexa-	The prefix "pentacontahexa-" means "fifty-six (56)." "Pentacontahexa-" is an alternate form of the prefix "pentacontakaihexa-."
pentacontakaidi-	The prefix "pentacontakaidi-" means "fifty-two (52)." See also Prefixes & Words Based On Greek Number Names.
pentacontakaidigon	The noun and adjective "pentacontakaidigon" means "a plain figure with fifty-two (52) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentacontakaidigram	The noun and adjective "pentacontakaidigram" means "an interconnected star figure with fifty-two (52) points formed by stellating a pentacontakaidigon." See also Prefixes & Words Based On Greek Number Names.
pentacontakaidihedron	The noun and adjective "pentacontakaidihedron" means "a solid figure with fifty-two (52) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentacontakaidyad	The noun and adjective "pentacontakaidyad" means "a group of fifty-two (52) members." See also Prefixes & Words Based On Greek Number Names.
pentacontakaiennea-	The prefix "pentacontakaiennea-" means "fifty-nine (59)." See also Prefixes & Words Based On Greek Number Names.
pentacontakaiennead	The noun and adjective "pentacontakaiennead" means "a group of fifty-nine (59) members." See also Prefixes & Words Based On Greek Number Names.
pentacontakaienneagon	The noun and adjective "pentacontakaienneagon" means "a plain figure with fifty-nine (59) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentacontakaienneagram	The noun and adjective "pentacontakaienneagram" means "an interconnected star figure with fifty-nine (59) points formed by stellating a pentacontakaienneagon." See also Prefixes & Words Based On Greek Number Names.
pentacontakaienneahedron	The noun and adjective "pentacontakaienneahedron" means "a solid figure with fifty-nine (59) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihena-	The prefix "pentacontakaihena-" means "fifty-one (51)." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihenad	The noun and adjective "pentacontakaihenad" means "a group of fifty-one (51) members." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihenagon	The noun and adjective "pentacontakaihenagon" means "a plain figure with fifty-one (51) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihenagram	The noun and adjective "pentacontakaihenagram" means "an interconnected star figure with fifty-one (51) points formed by stellating a pentacontakaihenagon." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihenahedron	The noun and adjective "pentacontakaihenahedron" means "a solid figure with fifty-one (51) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihepta-	The prefix "pentacontakaihepta-" means "fifty-seven (57)." See also Prefixes & Words Based On Greek Number Names.
pentacontakaiheptad	The noun and adjective "pentacontakaiheptad" means "a group of fifty-seven (57) members." See also Prefixes & Words Based On Greek Number Names.
pentacontakaiheptagon	The noun and adjective "pentacontakaiheptagon" means "a plain figure with fifty-seven (57) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentacontakaiheptagram	The noun and adjective "pentacontakaiheptagram" means "an interconnected star figure with fifty-seven (57) points formed by stellating a pentacontakaiheptagon." See also Prefixes & Words Based On Greek Number Names.
pentacontakaiheptahedron	The noun and adjective "pentacontakaiheptahedron" means "a solid figure with fifty-seven (57) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihexa-	The prefix "pentacontakaihexa-" means "fifty-six (56)." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihexad	The noun and adjective "pentacontakaihexad" means "a group of fifty-six (56) members." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihexagon	The noun and adjective "pentacontakaihexagon" means "a plain figure with fifty-six (56) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihexagram	The noun and adjective "pentacontakaihexagram" means "an interconnected star figure with fifty-six (56) points formed by stellating a pentacontakaihexagon." See also Prefixes & Words Based On Greek Number Names.
pentacontakaihexahedron	The noun and adjective "pentacontakaihexahedron" means "a solid figure with fifty-six (56) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentacontakaiocta-	The prefix "pentacontakaiocta-" means "fifty-eight (58)." See also Prefixes & Words Based On Greek Number Names.
pentacontakaioctad	The noun and adjective "pentacontakaioctad" means "a group of fifty-eight (58) members." See also Prefixes & Words Based On Greek Number Names.
pentacontakaioctagon	The noun and adjective "pentacontakaioctagon" means "a plain figure with fifty-eight (58) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentacontakaioctagram	The noun and adjective "pentacontakaioctagram" means "an interconnected star figure with fifty-eight (58) points formed by stellating a pentacontakaioctagon." See also Prefixes & Words Based On Greek Number Names.
pentacontakaioctahedron	The noun and adjective "pentacontakaioctahedron" means "a solid figure with fifty-eight (58) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentacontakaipenta-	The prefix "pentacontakaipenta-" means "fifty-five (55)." See also Prefixes & Words Based On Greek Number Names.
pentacontakaipentad	The noun and adjective "pentacontakaipentad" means "a group of fifty-five (55) members." See also Prefixes & Words Based On Greek Number Names.
pentacontakaipentagon	The noun and adjective "pentacontakaipentagon" means "a plain figure with fifty-five (55) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentacontakaipentagram	The noun and adjective "pentacontakaipentagram" means "an interconnected star figure with fifty-five (55) points formed by stellating a pentacontakaipentagon." See also Prefixes & Words Based On Greek Number Names.
pentacontakaipentahedron	The noun and adjective "pentacontakaipentahedron" means "a solid figure with fifty-five (55) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentacontakaitetra-	The prefix "pentacontakaitetra-" means "fifty-four (54)." See also Prefixes & Words Based On Greek Number Names.
pentacontakaitetrad	The noun and adjective "pentacontakaitetrad" means "a group of fifty-four (54) members." See also Prefixes & Words Based On Greek Number Names.
pentacontakaitetragon	The noun and adjective "pentacontakaitetragon" means "a plain figure with fifty-four (54) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentacontakaitetragram	The noun and adjective "pentacontakaitetragram" means "an interconnected star figure with fifty-four (54) points formed by stellating a pentacontakaitetragon." See also Prefixes & Words Based On Greek Number Names.
pentacontakaitetrahedron	The noun and adjective "pentacontakaitetrahedron" means "a solid figure with fifty-four (54) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentacontakaitri-	The prefix "pentacontakaitri-" means "fifty-three (53)." See also Prefixes & Words Based On Greek Number Names.
pentacontakaitriad	The noun and adjective "pentacontakaitriad" means "a group of fifty-three (53) members." See also Prefixes & Words Based On Greek Number Names.
pentacontakaitrigon	The noun and adjective "pentacontakaitrigon" means "a plain figure with fifty-three (53) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentacontakaitrigram	The noun and adjective "pentacontakaitrigram" means "an interconnected star figure with fifty-three (53) points formed by stellating a pentacontakaitrigon." See also Prefixes & Words Based On Greek Number Names.
pentacontakaitrihedron	The noun and adjective "pentacontakaitrihedron" means "a solid figure with fifty-three (53) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentacontaocta-	The prefix "pentacontaocta-" means "fifty-eight (58)." "Pentacontaocta-" is an alternate form of the prefix "pentacontakaiocta-." See also Prefixes & Words Based On Greek Number Names.
pentacontapenta-	The prefix "pentacontapenta-" means "fifty-five (55)." "Pentacontapenta-" is an alternate form of the prefix "pentacontakaipenta-."
pentacontatetra-	The prefix "pentacontatetra-" means "fifty-four (54)." "Pentacontatetra-" is an alternate form of the prefix "pentacontakaitetra-."
pentacontatri-	The prefix "pentacontatri-" means "fifty-three (53)." "Pentacontatri-" is an alternate form of the prefix "pentacontakaitri-."
pentacta-	The prefix "pentacta-" means "five hundred (500)." See also Numeric Prefixes Used In Chemistry.
pentad	The noun and adjective "pentad" means "a group of five (5) members." See also Prefixes & Words Based On Greek Number Names.
pentadeca-	The prefix "pentadeca-" means "fifteen (15)." See also Numeric Prefixes Used In Chemistry.
pentagon	The noun and adjective "pentagon" means "a plain figure with five (5) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentagram	1. The noun and adjective "pentagram" means "an interconnected star figure with five (5) points formed by stellating a pentagon." See also Prefixes & Words Based On Greek Number Names.
pentagram	2. The noun "pentagram" means "a word or character sequence consisting of five (5) characters."
pentahedron	The noun and adjective "pentahedron" means "a solid figure with five (5) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentaheptaconta-	The prefix "pentaheptaconta-" means "seventy-five (75)." See also Numeric Prefixes Used In Chemistry.
pentahexaconta-	The prefix "pentahexaconta-" means "sixty-five (65)." See also Numeric Prefixes Used In Chemistry.
pentaicosa-	The prefix "pentaicosa-" means "twenty-five (25)." See also Numeric Prefixes Used In Chemistry.
pentakaideca-	The prefix "pentakaideca-" means "fifteen (15)." See also Prefixes & Words Based On Greek Number Names.
pentakaidecad	The noun and adjective "pentakaidecad" means "a group of fifteen (15) members." See also Prefixes & Words Based On Greek Number Names.
pentakaidecagon	The noun and adjective "pentakaidecagon" means "a plain figure with fifteen (15) straight sides." See also Prefixes & Words Based On Greek Number Names.
pentakaidecagram	The noun and adjective "pentakaidecagram" means "an interconnected star figure with fifteen (15) points formed by stellating a pentakaidecagon." See also Prefixes & Words Based On Greek Number Names.
pentakaidecahedron	The noun and adjective "pentakaidecahedron" means "a solid figure with fifteen (15) planar faces." See also Prefixes & Words Based On Greek Number Names.
pentalia-	The prefix "pentalia-" means "five thousand (5000)." See also Numeric Prefixes Used In Chemistry.
pentameter	The noun "pentameter" means "a verse consisting of five (5) metrical feet."
pentangle	The noun "pentangle" means "a plane figure with five (5) vertices."
pentanonaconta-	The prefix "pentanonaconta-" means "ninety-five (95)." See also Numeric Prefixes Used In Chemistry.
pentaoctaconta-	The prefix "pentaoctaconta-" means "eighty-five (85)." See also Numeric Prefixes Used In Chemistry.
pentapentaconta-	The prefix "pentapentaconta-" means "fifty-five (55)." See also Numeric Prefixes Used In Chemistry.
pentatetraconta-	The prefix "pentatetraconta-" means "forty-five (45)." See also Numeric Prefixes Used In Chemistry.
pentathlon	The noun "pentathlon" means "an athletic competition consisting of five (5) separate events."
pentatriaconta-	The prefix "pentatriaconta-" means "thirty-five (35)." See also Numeric Prefixes Used In Chemistry.
Pentecost	The noun "Pentecost" means "the fiftieth (50^th) day of the Christian Easter Season."
penult	The noun "penult" means "the next to the last member of a series."
penultimate	The adjective "penultimate" means "the next to the last member of a series."
per centum	The compound noun "per centum" is the original Latin form of "percent."
per hundred	The compound noun "per hundred" (suffix symbol: -% {percent sign} ) means "a relative portion represented as a ratio to one one-hundredth (1/100 = 0.010) of the whole."
per hundred thousand	The compound noun "per hundred thousand" means "a relative portion represented as a ratio to one one-hundred-thousandth (1/100,000 = 0.000 010) of the whole."
per mil	The compound noun "per mil" (suffix symbol: -‰ {per mille sign} ) means "a relative portion represented as a ratio to one one-thousandth (1/1,000 = 0.001) of the whole." Small portions may be represented "per mil" rather than "percent."
per mill	The compound noun "per mill" is an alternate spelling of "per mil."
per mille	The compound noun "per mille" is the original Latin form of "per mil."
-‰	The suffix symbol -‰ {per mille sign} denotes a quantity as "per mil" which means "a relative portion represented as a ratio to one one-thousandth (1/1,000 = 0.001) of the whole."
per million	The compound noun "per million" means "a relative portion represented as a ratio to one one-millionth (1/1,000,000 = 0.000 001) of the whole."
per ten thousand	The compound noun "per ten thousand" means "a relative portion represented as a ratio to one ten-thousandth (1/10,000 = 0.000 100) of the whole."
per thousand	The compound noun "per thousand" (suffix symbol: -‰ {per mille sign} ) means "a relative portion represented as a ratio to one one-thousandth (1/1,000 = 0.001) of the whole."
percent	The noun "percent" (suffix symbol: -% {percent sign} ) means "a relative portion represented as a ratio to one one-hundredth (1/100 = 0.010) of the whole." Usage: A relative change in value may be measured as a percent increase (gain) or decrease (loss) from the base quantity. The first value always serves as the base quantity. Thus, a change from 40.00 to 50.00 is a 25% increase and a change from 50.00 to 40.00 is a 20% decrease. Successive percent changes cannot be added, e.g., a 20% gain followed by a 20% loss yields a net loss of 4%. A doubling is a 100% increase and a tripling is a 200% increase.
-%	The suffix symbol -% {percent sign} denotes a quantity as "percent" which means "a relative portion represented as a ratio to one one-hundredth (1/100 = 0.010) of the whole."
percentage	The noun "percentage" means "a portion expressed as a percent of the whole."
percentile	The noun "percentile" means "the percent of a frequency distribution that is less than or equal to a given value."
peta-	The metric prefix "peta-" (prefix symbol: P- ) denotes a multiple of ten to the fifteenth power (10¹⁵ = 1E+15 = 1,000,000,000,000,000) as defined by Le Système International d'Unités (SI).
petabinary	The adjective "petabinary" means "two to the fiftieth power (2⁵⁰ = 1,125,899,906,842,624)." See also binary prefix "pebi-" and compound binary prefix symbol "Pi-."
φ	The Greek lower case letter φ {phi} represents the irrational number that is one greater than its multiplicative inverse, i.e., φ = 1 + 1/φ. Φ is equal to (1+5^½)/2 or approximately 1.618 033 988 750. The ancient Egyptians discovered φ, which they honored as their "Sacred Ratio." The ancient Greeks treasured φ as their "Golden Ratio." The ratio φ is used extensively in art and architecture. See also The Golden Mean and Golden Ratio.
π	The Greek lower case letter π {pi} represents "Archimedes' Constant," the ratio of the circumference of a circle to its diameter. π is a transcendental number approximately 3.141 592 653 590. See also Archimedes' Constant and Pi.
Pi-	The compound binary prefix symbol Pi- (binary prefix: "pebi-" ) denotes a multiple of two to the fiftieth power (2⁵⁰ = 1,125,899,906,842,624) as defined by the International Electrotechnical Commission (IEC). See also "petabinary."
pico-	The metric prefix "pico-" (prefix symbol: p- ) denotes a multiple of ten to the negative twelfth power (10^-12 = 1E-12 = 0.000 000 000 001) as defined by Le Système International d'Unités (SI).
-plex	The suffix "-plex" means "a building divided into the prefix number of spaces." Usage: The suffix "-plex" most commonly refers to housing and theatre complexes. "Duplex" is an alternate name for a "twoplex (2-plex)" and "triplex" is an alternate name for a "threeplex (3-plex)." A "multiplex" is "a building with many spaces." Origin: The suffix "-plex" is a back formation of the noun "complex."
plural	The adjective "plural" means "more than one (>1)."
plurality	1. The noun "plurality" means "the state of being more than one (>1)."
plurality	2. The noun "plurality" means "the largest number of votes cast in an election for any candidate or question, especially if less than a majority."
plus	1. The preposition "plus" (symbol: + {plus sign} ) denotes the operation of addition. See also "Plus."
plus	2. The adjective and noun "plus" (prefix symbol: + {plus sign} ) means "positive" or "greater than zero (>0)."
±	The symbol ± {plus or minus sign} is used to denote a quantity which should be both added and subtracted. The ± symbol can be used to denote a range of uncertainty, or to denote a pair of quantities, such as the two roots of a quadratic equation. See also "Plus or Minus Sign."
+	The symbol + {plus sign} is pronounced as "plus". As a mathematical operator, the "plus sign" represents the operation of addition. The "plus sign" may also be used as an optional prefix to denote a positive number. The "plus sign" is also used to denote a positive polarity or direction. See also "Plus Sign."
poly-	The prefix "poly-" means "having more than one (>1)."
polygamic	The adjective "polygamic" means "being engaged in multiple marriage."
polygamist	The noun and adjective "polygamist" means "a person who is engaged in multiple marriage."
polygamous	The adjective "polygamous" means "being engaged in multiple marriage."
polygamy	The noun "polygamy" means "marriage to more than one (1) spouse at the same time." Usage: Polygamy usually refers to multiple marriage that is socially accepted, at least among a social subgroup. Bigamy usually refers to illegal multiple marriage.
positive	1. The adjective and noun "positive" means "greater than zero (>0)." A "positive" quantity may be denoted with the optional prefix symbol + {plus sign}. "Positive" has the opposite polarity, direction, or meaning of "negative."
positive	2. The adjective and noun "positive" is a logical value. "Negative" and "positive" are sometimes used as a binary logic pair.
ppb	In North American use, the compound symbol "ppb" represents "parts per billion" designating "a relative portion represented as a ratio to ten to the negative ninth power (10^-9 = 1E-09 = 0.000 000 001) of the whole, usually by mass."
ppm	The compound symbol "ppm" represents "parts per million" designating "a relative portion represented as a ratio to one one-millionth (1/1,000,000 = 0.000 001) of the whole, usually by mass."
ppq	In North American use, the compound symbol "ppq" represents "parts per quadrillion" designating "a relative portion represented as a ratio to ten to the negative fifteenth power (10^-15 = 1E-15 = 0.000 000 000 000 001) of the whole, usually by mass."
ppt	1. The compound symbol "ppt" represents "parts per thousand" designating "a relative portion represented as a ratio to one one-thousandth (1/1,000 = 0. 001) of the whole, usually by mass."
ppt	2. In North American use, the compound symbol "ppt" represents "parts per trillion" designating "a relative portion represented as a ratio to ten to the negative twelfth power (10^-12 = 1E-12 = 0.000 000 000 001) of the whole, usually by mass."
premier	The adjective and noun "premier" means "first (1st) in time, order, rank, or importance."
preteen	The noun and adjective "preteen" means "less than thirteen (13) years of age." "Preteen" commonly means "between nine (9) and thirteen (13) years of age."
primal	The adjective "primal" means "first (1^st)."
primary	The adjective and noun "primary" means "first (1^st) in order or importance."
primate	The noun and adjective "primate" means "a member of the first (1^st) rank or order."
prime	1. The adjective "prime" means "of first (1^st) rank."
-′	2. The suffix symbol -′ {prime} denotes a linear measurement in feet. One foot is equal to 0.304 800 meter.
-′	3. The suffix symbol -′ {prime} denotes an angular measurement in minutes. One minute is equal to one sixtieth (1/60) of a degree (suffix symbol: -° {degree symbol} ) or one twenty-one-thousand-six-hundredth (1/21,600) of a circle.
prime number	A prime number is an integer greater than one (1) that is a multiple of no integer other than itself and one (1), e.g., 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, etc. See also "Prime Number" and Prime Factors and Factor Pairs for the Integers One Through Ten Thousand.
prince	The noun "prince" means "a man of the first (1st) or highest rank of citizenship."
princely	The adjective and adverb "princely" means "of the first (1st) or highest rank of citizenship."
princess	The noun "princess" means "a woman of the first (1st) or highest rank of citizenship."
Pythagoras' Constant	"Pythagoras' Constant" is the ratio of the length of a diagonal of a square to the length of a side of the square. "Pythagoras' Constant" is an irrational number equal to the square root of two or approximately 1.414 213 562 373. See also "Pythagoras' Constant" and "Pythagoras's Constant."
quadra-	The numeric prefix "quadra-" means "four (4)." This prefix is derived from the Latin cardinal number "quattuor (IIII)."
quadragenarian	The noun and adjective "quadragenarian" means "between forty (40) and fifty (50) years of age." See also "forty-something."
quadragenary	The adjective "quadragenary" means "having forty (40) parts."
quadragesimal	The adjective "quadragesimal" means "based on the number forty (40)."
quadraginta-	The numeric prefix "quadraginta-" means "forty (40)." This prefix is derived from the Latin cardinal number "quadraginta (XXXX)."
quadragintennary	The noun and adjective "quadragintennary" means "a group of forty (40) or a period of forty (40) years."
quadragintennial	1. The adjective and noun "quadragintennial" means "recurring every forty (40) years."
	2. The adjective and noun "quadragintennial" means "lasting forty (40) years."
	3. The noun and adjective "quadragintennial" means "a forty (40) year anniversary."
quadragintennium	The noun and adjective "quadragintennium" means "a period of forty (40) years."
quadragintillion	The noun and adjective "quadragintillion" means multiplied by 10¹²³ in the American number naming system, but means multiplied by 10²⁴⁰ in the Chuquet number naming system. See also Large Numbers.
quadrancentennial	1. The adjective and noun "quadrancentennial" means "recurring every twenty-five (25) years."
	2. The adjective and noun "quadrancentennial" means "lasting twenty-five (25) years."
	3. The noun and adjective "quadrancentennial" means "a twenty-five (25) year anniversary."
quadrangle	The noun "quadrangle" means "a plane figure with four (4) vertices."
quadrangular	The adjective "quadrangular" means "having four (4) vertices."
quadranmillenary	1. The noun and adjective "quadranmillenary" means "a group of two hundred fifty (250)."
	2. The noun and adjective "quadranmillenary" means "a period of two hundred fifty (250) years."
	3. The noun and adjective "quadranmillenary" means "a two hundred fifty (250) year anniversary."
	4. The adjective and noun "quadranmillenary" means "two hundred fiftieth (250th) in rank or order."
quadranmillennial	1. The adjective and noun "quadranmillennial" means "recurring every two hundred fifty (250) years."
	2. The adjective and noun "quadranmillennial" means "lasting two hundred fifty (250) years."
	3. The noun and adjective "quadranmillennial" means "a two hundred fifty (250) year anniversary."
quadranmillennium	The noun and adjective "quadranmillennium" means "a period of two hundred fifty (250) years."
quadrennary	The noun and adjective "quadrennary" means "a group of four (4) or a period of four (4) years."
quadrennial	1. The adjective and noun "quadrennial" means "recurring every four (4) years."
	2. The adjective and noun "quadrennial" means "lasting four (4) years."
	3. The noun and adjective "quadrennial" means "a four (4) year anniversary."
quadrennium	The noun and adjective "quadrennium" means "a period of four (4) years."
quadricennial	The noun and adjective "quadricennial" means "a forty (40) year anniversary."
quadricentenary	1. The noun and adjective "quadricentenary" means "a group of four hundred (400)."
	2. The noun and adjective "quadricentenary" means "a period of four hundred (400) years."
	3. The noun and adjective "quadricentenary" means "a four hundred (400) year anniversary."
	4. The adjective and noun "quadricentenary" means "four hundredth (400th) in rank or order."
quadricentennial	1. The adjective and noun "quadricentennial" means "recurring every four hundred (400) years."
	2. The adjective and noun "quadricentennial" means "lasting four hundred (400) years."
	3. The noun and adjective "quadricentennial" means "a four hundred (400) year anniversary."
quadricentennium	The noun and adjective "quadricentennium" means "a period of four hundred (400) years."
quadricycle	The noun, adjective, and verb "quadricycle" means "having four (4) wheels."
quadriennial	The adjective "quadriennial" means "recurring every four (4) years."
quadrikibinal	The adjective "quadrikibinal" means "based on the number four thousand ninety-six (2¹² = 4096)." See also Base Number Systems.
quadrilateral	The adjective "quadrilateral" means "having four (4) sides."
quadrilliard	The noun and adjective "quadrilliard" means "multiplied by ten to the twenty-seventh power (10²⁷ = 1E+27 = 1,000,000,000,000,000,000,000,000,000)" in the modified Chuquet number naming system.
quadrillion	The noun and adjective "quadrillion" means multiplied by ten to the fifteenth power (10¹⁵ = 1E+15 = 1,000,000,000,000,000) in the American number naming system, but means multiplied by ten to the twenty-fourth power (10²⁴ = 1E+24 = 1,000,000,000,000,000,000,000,000) in the Chuquet number naming system. See also Large Numbers.
quadrimillenary	1. The noun and adjective "quadrimillenary" means "a group of four thousand (4000)."
	2. The noun and adjective "quadrimillenary" means "a period of four thousand (4000) years."
	3. The noun and adjective "quadrimillenary" means "a four thousand (4000) year anniversary."
	4. The adjective and noun "quadrimillenary" means "four thousandth (4000th) in rank or order."
quadrimillennial	1. The adjective and noun "quadrimillennial" means "recurring every four thousand (4000) years."
	2. The adjective and noun "quadrimillennial" means "lasting four thousand (4000) years."
	3. The noun and adjective "quadrimillennial" means "a four thousand (4000) year anniversary."
quadrimillennium	The noun and adjective "quadrimillennium" means "a period of four thousand (4000) years."
quadriplegia	The noun "quadruplegia" means "a paralysis of all four (4) limbs."
quadriplegic	The adjective and noun "quadruplegic" means "having a paralysis of all four (4) limbs."
quadruped	The noun "quadruped" means "an animal with four (4) feet."
quadrupedal	The adjective "quadrupedal" means "having four (4) feet."
quadruple	The adjective and noun "quadruple" means "multiplied by four (4)."
quadruplet	The noun and adjective "quadruplet" means "one of four (4) siblings born together" or "one of four (4) very similar things."
quadruplicate	The verb, noun, and adjective "quadruplicate" means "to make three (3) copies of one original, for a total of four (4) objects."
quantity	1. The noun and adjective "quantity" means "either an abstract number or a hypothetically measurable physical attribute."
quantity	2. The noun and adjective "quantity" means "a significantly large quantity."
quart	The noun and adjective "quart" means "one quarter (1/4) of a gallon."
quartal	The adjective "quartal" means "based on the number four (4)." See also Base Number Notation.
quarter	1. The noun and adjective "quarter (1/4)" means "divided by four (4)." A "quarter" coin has a value of "one fourth of a dollar ($0.25)." See also "fourth."
quarter	2. The verb "quarter" means "to divide by four (1/4)."
quarter century	The compound noun "quarter century" means "twenty-five (25) years."
quarterly	The adjective "quarterly" means "recurring once (1) in each quarter (1/4) of the year or every three (3) months."
quartet	The noun "quartet" means "a group of four (4) members."
quartile	The noun "quartile" means "a frequency distribution divided into four (4) equal parts."
quarto	The noun "quarto (4to)" means "a book with leaves printed on one fourth (1/4) of the printer sheet."
quasquicentenary	1. The noun and adjective "quasquicentenary" means "a group of one hundred twenty-five (125)."
	2. The noun and adjective "quasquicentenary" means "a period of one hundred twenty-five (125) years."
	3. The noun and adjective "quasquicentenary" means "a one hundred twenty-five (125) year anniversary."
	4. The adjective and noun "quasquicentenary" means "one hundred twenty-fifth (125th) in rank or order."
quasquicentennial	1. The adjective and noun "quasquicentennial" means "recurring every one hundred twenty-five (125) years."
	2. The adjective and noun "quasquicentennial" means "lasting one hundred twenty-five (125) years."
	3. The noun and adjective "quasquicentennial" means "a one hundred twenty-five (125) year anniversary."
quasquicentennium	The noun and adjective "quasquicentennium" means "a period of one hundred twenty-five (125) years."
quaternary	1. The adjective and noun "quaternary" means "fourth (4^th) in order or importance."
quaternary	2. The adjective "quaternary" means "having four (4) parts." See also Base Number Notation.
quattuordecennary	The noun and adjective "quattuordecennary" means "a group of fourteen (14) or a period of fourteen (14) years."
quattuordecennial	1. The adjective and noun "quattuordecennial" means "recurring every fourteen (14) years."
	2. The adjective and noun "quattuordecennial" means "lasting fourteen (14) years."
	3. The noun and adjective "quattuordecennial" means "a fourteen (14) year anniversary."
quattuordecennium	The noun and adjective "quattuordecennium" means "a period of fourteen (14) years."
quattuordecentenary	1. The noun and adjective "quattuordecentenary" means "a group of one thousand four hundred (1400)."
	2. The noun and adjective "quattuordecentenary" means "a period of one thousand four hundred (1400) years."
	3. The noun and adjective "quattuordecentenary" means "a one thousand four hundred (1400) year anniversary."
	4. The adjective and noun "quattuordecentenary" means "one thousand four hundredth (1400th) in rank or order."
quattuordecentennial	1. The adjective and noun "quattuordecentennial" means "recurring every one thousand four hundred (1400) years."
	2. The adjective and noun "quattuordecentennial" means "lasting one thousand four hundred (1400) years."
	3. The noun and adjective "quattuordecentennial" means "a one thousand four hundred (1400) year anniversary."
quattuordecentennium	The noun and adjective "quattuordecentennium" means "a period of one thousand four hundred (1400) years."
quattuordeci-	The numeric prefix "quattuordeci-" means "fourteen (14)." This prefix is derived from the Latin cardinal number "quattuordecim (XIIII)."
quattuordecillion	The noun and adjective "quattuordecillion" means multiplied by 10⁴⁵ in the American number naming system, but means multiplied by 10⁸⁴ in the Chuquet number naming system. See also Large Numbers.
quattuornonaginta-	The numeric prefix "quattuornonaginta-" means "ninety-four (94)." This prefix is derived from the Latin cardinal number "quattuor et nonaginta (LXXXXIIII)."
quattuornonagintennary	The noun and adjective "quattuornonagintennary" means "a group of ninety-four (94) or a period of ninety-four (94) years."
quattuornonagintennial	1. The adjective and noun "quattuornonagintennial" means "recurring every ninety-four (94) years."
	2. The adjective and noun "quattuornonagintennial" means "lasting ninety-four (94) years."
	3. The noun and adjective "quattuornonagintennial" means "a ninety-four (94) year anniversary."
quattuornonagintennium	The noun and adjective "quattuornonagintennium" means "a period of ninety-four (94) years."
quattuornonagintillion	The noun and adjective "quattuornonagintillion" means multiplied by 10²⁸⁵ in the American number naming system, but means multiplied by 10⁵⁶⁴ in the Chuquet number naming system. See also Large Numbers.
quattuoroctoginta-	The numeric prefix "quattuoroctoginta-" means "eighty-four (84)." This prefix is derived from the Latin cardinal number "quattuor et octoginta (LXXXIIII)."
quattuoroctogintennary	The noun and adjective "quattuoroctogintennary" means "a group of eighty-four (84) or a period of eighty-four (84) years."
quattuoroctogintennial	1. The adjective and noun "quattuoroctogintennial" means "recurring every eighty-four (84) years."
	2. The adjective and noun "quattuoroctogintennial" means "lasting eighty-four (84) years."
	3. The noun and adjective "quattuoroctogintennial" means "an eighty-four (84) year anniversary."
quattuoroctogintennium	The noun and adjective "quattuoroctogintennium" means "a period of eighty-four (84) years."
quattuoroctogintillion	The noun and adjective "quattuoroctogintillion" means multiplied by 10²⁵⁵ in the American number naming system, but means multiplied by 10⁵⁰⁴ in the Chuquet number naming system. See also Large Numbers.
quattuorquadraginta-	The numeric prefix "quattuorquadraginta-" means "forty-four (44)." This prefix is derived from the Latin cardinal number "quattuor et quadraginta (XXXXIIII)."
quattuorquadragintennary	The noun and adjective "quattuorquadragintennary" means "a group of forty-four (44) or a period of forty-four (44) years."
quattuorquadragintennial	1. The adjective and noun "quattuorquadragintennial" means "recurring every forty-four (44) years."
	2. The adjective and noun "quattuorquadragintennial" means "lasting forty-four (44) years."
	3. The noun and adjective "quattuorquadragintennial" means "a forty-four (44) year anniversary."
quattuorquadragintennium	The noun and adjective "quattuorquadragintennium" means "a period of forty-four (44) years."
quattuorquadragintillion	The noun and adjective "quattuorquadragintillion" means multiplied by 10¹³⁵ in the American number naming system, but means multiplied by 10²⁶⁴ in the Chuquet number naming system. See also Large Numbers.
quattuorquinquaginta-	The numeric prefix "quattuorquinquaginta-" means "fifty-four (54)." This prefix is derived from the Latin cardinal number "quattuor et quinquaginta (LIIII)."
quattuorquinquagintennary	The noun and adjective "quattuorquinquagintennary" means "a group of fifty-four (54) or a period of fifty-four (54) years."
quattuorquinquagintennial	1. The adjective and noun "quattuorquinquagintennial" means "recurring every fifty-four (54) years."
	2. The adjective and noun "quattuorquinquagintennial" means "lasting fifty-four (54) years."
	3. The noun and adjective "quattuorquinquagintennial" means "a fifty-four (54) year anniversary."
quattuorquinquagintennium	The noun and adjective "quattuorquinquagintennium" means "a period of fifty-four (54) years."
quattuorquinquagintillion	The noun and adjective "quattuorquinquagintillion" means multiplied by 10¹⁶⁵ in the American number naming system, but means multiplied by 10³²⁴ in the Chuquet number naming system. See also Large Numbers.
quattuorseptuaginta-	The numeric prefix "quattuorseptuaginta-" means "seventy-four (74)." This prefix is derived from the Latin cardinal number "quattuor et septuaginta (LXXIIII)."
quattuorseptuagintennary	The noun and adjective "quattuorseptuagintennary" means "a group of seventy-four (74) or a period of seventy-four (74) years."
quattuorseptuagintennial	1. The adjective and noun "quattuorseptuagintennial" means "recurring every seventy-four (74) years."
	2. The adjective and noun "quattuorseptuagintennial" means "lasting seventy-four (74) years."
	3. The noun and adjective "quattuorseptuagintennial" means "a seventy-four (74) year anniversary."
quattuorseptuagintennium	The noun and adjective "quattuorseptuagintennium" means "a period of seventy-four (74) years."
quattuorseptuagintillion	The noun and adjective "quattuorseptuagintillion" means multiplied by 10²²⁵ in the American number naming system, but means multiplied by 10⁴⁴⁴ in the Chuquet number naming system. See also Large Numbers.
quattuorsexaginta-	The numeric prefix "quattuorsexaginta-" means "sixty-four (64)." This prefix is derived from the Latin cardinal number "quattuor et sexaginta (LXIIII)."
quattuorsexagintakibinal	The adjective "quattuorsexagintakibinal" means "based on the number sixty-five thousand five hundred thirty-six (2¹⁶ = 65,536)." See also Base Number Systems.
quattuorsexagintennary	The noun and adjective "quattuorsexagintennary" means "a group of sixty-four (64) or a period of sixty-four (64) years."
quattuorsexagintennial	1. The adjective and noun "quattuorsexagintennial" means "recurring every sixty-four (64) years."
	2. The adjective and noun "quattuorsexagintennial" means "lasting sixty-four (64) years."
	3. The noun and adjective "quattuorsexagintennial" means "a sixty-four (64) year anniversary."
quattuorsexagintennium	The noun and adjective "quattuorsexagintennium" means "a period of sixty-four (64) years."
quattuorsexagintillion	The noun and adjective "quattuorsexagintillion" means multiplied by 10¹⁹⁵ in the American number naming system, but means multiplied by 10³⁸⁴ in the Chuquet number naming system. See also Large Numbers.
quattuortriginta-	The numeric prefix "quattuortriginta-" means "thirty-four (34)." This prefix is derived from the Latin cardinal number "quattuor et triginta (XXXIIII)."
quattuortrigintacentenary	1. The noun and adjective "quattuortrigintacentenary" means "a group of three thousand four hundred (3400)."
	2. The noun and adjective "quattuortrigintacentenary" means "a period of three thousand four hundred (3400) years."
	3. The noun and adjective "quattuortrigintacentenary" means "a three thousand four hundred (3400) year anniversary."
	4. The adjective and noun "quattuortrigintacentenary" means "three thousand four hundredth (3400th) in rank or order."
quattuortrigintacentennial	1. The adjective and noun "quattuortrigintacentennial" means "recurring every three thousand four hundred (3400) years."
	2. The adjective and noun "quattuortrigintacentennial" means "lasting three thousand four hundred (3400) years."
	3. The noun and adjective "quattuortrigintacentennial" means "a three thousand four hundred (3400) year anniversary."
quattuortrigintacentennium	The noun and adjective "quattuortrigintacentennium" means "a period of three thousand four hundred (3400) years."
quattuortrigintennary	The noun and adjective "quattuortrigintennary" means "a group of thirty-four (34) or a period of thirty-four (34) years."
quattuortrigintennial	1. The adjective and noun "quattuortrigintennial" means "recurring every thirty-four (34) years."
	2. The adjective and noun "quattuortrigintennial" means "lasting thirty-four (34) years."
	3. The noun and adjective "quattuortrigintennial" means "a thirty-four (34) year anniversary."
quattuortrigintennium	The noun and adjective "quattuortrigintennium" means "a period of thirty-four (34) years."
quattuortrigintillion	The noun and adjective "quattuortrigintillion" means multiplied by 10¹⁰⁵ in the American number naming system, but means multiplied by 10²⁰⁴ in the Chuquet number naming system. See also Large Numbers.
quattuorvigesimal	The adjective "quattuorvigesimal" means "based on the number twenty-four (24)." See also Base Number Notation.
quattuorvigintennary	The noun and adjective "quattuorvigintennary" means "a group of twenty-four (24) or a period of twenty-four (24) years."
quattuorvigintennial	1. The adjective and noun "quattuorvigintennial" means "recurring every twenty-four (24) years."
	2. The adjective and noun "quattuorvigintennial" means "lasting twenty-four (24) years."
	3. The noun and adjective "quattuorvigintennial" means "a twenty-four (24) year anniversary."
quattuorvigintennium	The noun and adjective "quattuorvigintennium" means "a period of twenty-four (24) years."
quattuorviginti-	The numeric prefix "quattuorviginti-" means "twenty-four (24)." This prefix is derived from the Latin cardinal number "quattuor et viginti (XXIIII)."
quattuorviginticentenary	1. The noun and adjective "quattuorviginticentenary" means "a group of two thousand four hundred (2400)."
	2. The noun and adjective "quattuorviginticentenary" means "a period of two thousand four hundred (2400) years."
	3. The noun and adjective "quattuorviginticentenary" means "a two thousand four hundred (2400) year anniversary."
	4. The adjective and noun "quattuorviginticentenary" means "two thousand four hundredth (2400th) in rank or order."
quattuorviginticentennial	1. The adjective and noun "quattuorviginticentennial" means "recurring every two thousand four hundred (2400) years."
	2. The adjective and noun "quattuorviginticentennial" means "lasting two thousand four hundred (2400) years."
	3. The noun and adjective "quattuorviginticentennial" means "a two thousand four hundred (2400) year anniversary."
quattuorviginticentennium	The noun and adjective "quattuorviginticentennium" means "a period of two thousand four hundred (2400) years."
quattuorvigintillion	The noun and adjective "quattuorvigintillion" means multiplied by 10⁷⁵ in the American number naming system, but means multiplied by 10¹⁴⁴ in the Chuquet number naming system. See also Large Numbers.
quinary	1. The adjective and noun "quinary" means "fifth (5^th) in order or importance."
quinary	2. The adjective "quinary" means "having five (5) parts."
quincentenary	1. The noun and adjective "quincentenary" means "a group of five hundred (500)."
	2. The noun and adjective "quincentenary" means "a period of five hundred (500) years."
	3. The noun and adjective "quincentenary" means "a five hundred (500) year anniversary."
	4. The adjective and noun "quincentenary" means "five hundredth (500th) in rank or order."
quincentennial	1. The adjective and noun "quincentennial" means "recurring every five hundred (500) years."
	2. The adjective and noun "quincentennial" means "lasting five hundred (500) years."
	3. The noun and adjective "quincentennial" means "a five hundred (500) year anniversary."
quincentennium	The noun and adjective "quincentennium" means "a period of five hundred (500) years."
quincunx	The noun "quincunx" means "five (5) objects arranged in a square or rectangle with one (1) at each corner and one (1) in the center."
quincux	The noun and adjective "quincux" means "having five (5) of something."
quindecennary	The noun and adjective "quindecennary" means "a group of fifteen (15) or a period of fifteen (15) years."
quindecennial	1. The adjective and noun "quindecennial" means "recurring every fifteen (15) years."
	2. The adjective and noun "quindecennial" means "lasting fifteen (15) years."
	3. The noun and adjective "quindecennial" means "a fifteen (15) year anniversary."
quindecennium	The noun and adjective "quindecennium" means "a period of fifteen (15) years."
quindeci-	The numeric prefix "quindeci-" means "fifteen (15)." This prefix is derived from the Latin cardinal number "quindecim (XV)."
quindecillion	The noun and adjective "quindecillion" means multiplied by 10⁴⁸ in the American number naming system, but means multiplied by 10⁹⁰ in the Chuquet number naming system. See also Large Numbers.
quindenary	The adjective "quindenary" means "having fifteen (15) parts."
quinmillenary	1. The noun and adjective "quinmillenary" means "a group of five thousand (5000)."
	2. The noun and adjective "quinmillenary" means "a period of five thousand (5000) years."
	3. The noun and adjective "quinmillenary" means "a five thousand (5000) year anniversary."
	4. The adjective and noun "quinmillenary" means "five thousandth (5000th) in rank or order."
quinmillennial	1. The adjective and noun "quinmillennial" means "recurring every five thousand (5000) years."
	2. The adjective and noun "quinmillennial" means "lasting five thousand (5000) years."
	3. The noun and adjective "quinmillennial" means "a five thousand (5000) year anniversary."
quinmillennium	The noun and adjective "quinmillennium" means "a period of five thousand (5000) years."
quinnonaginta-	The numeric prefix "quinnonaginta-" means "ninety-five (95)." This prefix is derived from the Latin cardinal number "quinque et nonaginta (LXXXXV)."
quinnonagintennary	The noun and adjective "quinnonagintennary" means "a group of ninety-five (95) or a period of ninety-five (95) years."
quinnonagintennial	1. The adjective and noun "quinnonagintennial" means "recurring every ninety-five (95) years."
	2. The adjective and noun "quinnonagintennial" means "lasting ninety-five (95) years."
	3. The noun and adjective "quinnonagintennial" means "a ninety-five (95) year anniversary."
quinnonagintennium	The noun and adjective "quinnonagintennium" means "a period of ninety-five (95) years."
quinnonagintillion	The noun and adjective "quinnonagintillion" means multiplied by 10²⁸⁸ in the American number naming system, but means multiplied by 10⁵⁷⁰ in the Chuquet number naming system. See also Large Numbers.
quinoctoginta-	The numeric prefix "quinoctoginta-" means "eighty-five (85)." This prefix is derived from the Latin cardinal number "quinque et octoginta (LXXXV)."
quinoctogintennary	The noun and adjective "quinoctogintennary" means "a group of eighty-five (85) or a period of eighty-five (85) years."
quinoctogintennial	1. The adjective and noun "quinoctogintennial" means "recurring every eighty-five (85) years."
	2. The adjective and noun "quinoctogintennial" means "lasting eighty-five (85) years."
	3. The noun and adjective "quinoctogintennial" means "an eighty-five (85) year anniversary."
quinoctogintennium	The noun and adjective "quinoctogintennium" means "a period of eighty-five (85) years."
quinoctogintillion	The noun and adjective "quinoctogintillion" means multiplied by 10²⁵⁸ in the American number naming system, but means multiplied by 10⁵¹⁰ in the Chuquet number naming system. See also Large Numbers.
quinquadraginta-	The numeric prefix "quinquadraginta-" means "forty-five (45)." This prefix is derived from the Latin cardinal number "quinque et quadraginta (XXXXV)."
quinquadragintennary	The noun and adjective "quinquadragintennary" means "a group of forty-five (45) or a period of forty-five (45) years."
quinquadragintennial	1. The adjective and noun "quinquadragintennial" means "recurring every forty-five (45) years."
	2. The adjective and noun "quinquadragintennial" means "lasting forty-five (45) years."
	3. The noun and adjective "quinquadragintennial" means "a forty-five (45) year anniversary."
quinquadragintennium	The noun and adjective "quinquadragintennium" means "a period of forty-five (45) years."
quinquadragintillion	The noun and adjective "quinquadragintillion" means multiplied by 10¹³⁸ in the American number naming system, but means multiplied by 10²⁷⁰ in the Chuquet number naming system. See also Large Numbers.
quinquagenarian	The noun and adjective "quinquagenarian" means "between fifty (50) and sixty (60) years of age." See also "fifty-something."
quinquagenary	The adjective "quinquagenary" means "having fifty (50) parts."
quinquagesimal	The adjective "quinquagesimal" means "based on the number fifty (50)."
quinquaginta-	The numeric prefix "quinquaginta-" means "fifty (50)." This prefix is derived from the Latin cardinal number "quinquaginta (L)."
quinquagintennary	The noun and adjective "quinquagintennary" means "a group of fifty (50) or a period of fifty (50) years."
quinquagintennial	1. The adjective and noun "quinquagintennial" means "recurring every fifty (50) years."
	2. The adjective and noun "quinquagintennial" means "lasting fifty (50) years."
	3. The noun and adjective "quinquagintennial" means "a fifty (50) year anniversary."
quinquagintennium	The noun and adjective "quinquagintennium" means "a period of fifty (50) years."
quinquagintillion	The noun and adjective "quinquagintillion" means multiplied by 10¹⁵³ in the American number naming system, but means multiplied by 10³⁰⁰ in the Chuquet number naming system. See also Large Numbers.
quinquelateral	The adjective "quinquelateral" means "having five (5) sides."
quinquennary	The noun and adjective "quinquennary" means "a group of five (5) or a period of five (5) years."
quinquennial	1. The adjective and noun "quinquennial" means "recurring every five (5) years."
	2. The adjective and noun "quinquennial" means "lasting five (5) years."
	3. The noun and adjective "quinquennial" means "a five (5) year anniversary."
quinquennium	The noun and adjective "quinquennium" means "a period of five (5) years."
quinquinquaginta-	The numeric prefix "quinquinquaginta-" means "fifty-five (55)." This prefix is derived from the Latin cardinal number "quinque et quinquaginta (LV)."
quinquinquagintennary	The noun and adjective "quinquinquagintennary" means "a group of fifty-five (55) or a period of fifty-five (55) years."
quinquinquagintennial	1. The adjective and noun "quinquinquagintennial" means "recurring every fifty-five (55) years."
	2. The adjective and noun "quinquinquagintennial" means "lasting fifty-five (55) years."
	3. The noun and adjective "quinquinquagintennial" means "a fifty-five (55) year anniversary."
quinquinquagintennium	The noun and adjective "quinquinquagintennium" means "a period of fifty-five (55) years."
quinquinquagintillion	The noun and adjective "quinquinquagintillion" means multiplied by 10¹⁶⁸ in the American number naming system, but means multiplied by 10³³⁰ in the Chuquet number naming system. See also Large Numbers.
quinseptuaginta-	The numeric prefix "quinseptuaginta-" means "seventy-five (75)." This prefix is derived from the Latin cardinal number "quinque et septuaginta (LXXV)."
quinseptuagintennary	The noun and adjective "quinseptuagintennary" means "a group of seventy-five (75) or a period of seventy-five (75) years."
quinseptuagintennial	1. The adjective and noun "quinseptuagintennial" means "recurring every seventy-five (75) years."
	2. The adjective and noun "quinseptuagintennial" means "lasting seventy-five (75) years."
	3. The noun and adjective "quinseptuagintennial" means "a seventy-five (75) year anniversary."
quinseptuagintennium	The noun and adjective "quinseptuagintennium" means "a period of seventy-five (75) years."
quinseptuagintillion	The noun and adjective "quinseptuagintillion" means multiplied by 10²²⁸ in the American number naming system, but means multiplied by 10⁴⁵⁰ in the Chuquet number naming system. See also Large Numbers.
quinsexaginta-	The numeric prefix "quinsexaginta-" means "sixty-five (65)." This prefix is derived from the Latin cardinal number "quinque et sexaginta (LXV)."
quinsexagintennary	The noun and adjective "quinsexagintennary" means "a group of sixty-five (65) or a period of sixty-five (65) years."
quinsexagintennial	1. The adjective and noun "quinsexagintennial" means "recurring every sixty-five (65) years."
	2. The adjective and noun "quinsexagintennial" means "lasting sixty-five (65) years."
	3. The noun and adjective "quinsexagintennial" means "a sixty-five (65) year anniversary."
quinsexagintennium	The noun and adjective "quinsexagintennium" means "a period of sixty-five (65) years."
quinsexagintillion	The noun and adjective "quinsexagintillion" means multiplied by 10¹⁹⁸ in the American number naming system, but means multiplied by 10³⁹⁰ in the Chuquet number naming system. See also Large Numbers.
quint	The noun and adjective "quint" means "one of five (5)."
quint-	The numeric prefix "quint-" means "five (5)." This prefix is derived from the Latin cardinal number "quinque (V)."
quintal	The adjective "quintal" means "based on the number five (5)." See also base five and Base Number Notation.
quintessence	The noun "quintessence" means "the fifth (5th) and highest essence of an object or being." See also "fifth essence." Origin: Aristotle taught that all things are composed of four material elements and one immaterial essence. The four material elements are earth, water, air, and fire. The fifth essence is the form of an object or the spirit of a being. The fifth essence creates the structure and logic of the universe.
quintessential	The adjective "quintessential" means "embodying the fifth (5th) and highest essence of an object or class." See also "quintessence."
quintet	The noun "quintet" means "a group of five (5) members."
quintile	The noun "quintile" means "a frequency distribution divided into five (5) equal parts."
quintillion	The noun and adjective "quintillion" means multiplied by 10¹⁸ in the American number naming system, but means multiplied by 10³⁰ in the Chuquet number naming system. See also Large Numbers.
quintriginta-	The numeric prefix "quintriginta-" means "thirty-five (35)." This prefix is derived from the Latin cardinal number "quinque et triginta (XXXV)."
quintrigintacentenary	1. The noun and adjective "quintrigintacentenary" means "a group of three thousand five hundred (3500)."
	2. The noun and adjective "quintrigintacentenary" means "a period of three thousand five hundred (3500) years."
	3. The noun and adjective "quintrigintacentenary" means "a three thousand five hundred (3500) year anniversary."
	4. The adjective and noun "quintrigintacentenary" means "three thousand five hundredth (3500th) in rank or order."
quintrigintacentennial	1. The adjective and noun "quintrigintacentennial" means "recurring every three thousand five hundred (3500) years."
	2. The adjective and noun "quintrigintacentennial" means "lasting three thousand five hundred (3500) years."
	3. The noun and adjective "quintrigintacentennial" means "a three thousand five hundred (3500) year anniversary."
quintrigintacentennium	The noun and adjective "quintrigintacentennium" means "a period of three thousand five hundred (3500) years."
quintrigintennary	The noun and adjective "quintrigintennary" means "a group of thirty-five (35) or a period of thirty-five (35) years."
quintrigintennial	1. The adjective and noun "quintrigintennial" means "recurring every thirty-five (35) years."
	2. The adjective and noun "quintrigintennial" means "lasting thirty-five (35) years."
	3. The noun and adjective "quintrigintennial" means "a thirty-five (35) year anniversary."
quintrigintennium	The noun and adjective "quintrigintennium" means "a period of thirty-five (35) years."
quintrigintillion	The noun and adjective "quintrigintillion" means multiplied by 10¹⁰⁸ in the American number naming system, but means multiplied by 10²¹⁰ in the Chuquet number naming system. See also Large Numbers.
quintuple	The verb, adjective, adverb, and noun "quintuple" means "multiply by five (5)."
quintuplet	1. The noun "quintuplet" means "five (5)."
quintuplet	2. The noun and adjective "quintuplet" means "one of five (5) siblings born together" or "one of five (5) very similar things."
quintuplicate	The verb, noun, and adjective "quintuplicate" means "to make four (4) copies of one original, for a total of five (5) objects."
quinvigintennary	The noun and adjective "quinvigintennary" means "a group of twenty-five (25) or a period of twenty-five (25) years."
quinvigintennial	1. The adjective and noun "quinvigintennial" means "recurring every twenty-five (25) years."
	2. The adjective and noun "quinvigintennial" means "lasting twenty-five (25) years."
	3. The noun and adjective "quinvigintennial" means "a twenty-five (25) year anniversary."
quinvigintennium	The noun and adjective "quinvigintennium" means "a period of twenty-five (25) years."
quinviginti-	The numeric prefix "quinviginti-" means "twenty-five (25)." This prefix is derived from the Latin cardinal number "quinque et viginti (XXV)."
quinviginticentenary	1. The noun and adjective "quinviginticentenary" means "a group of two thousand five hundred (2500)."
	2. The noun and adjective "quinviginticentenary" means "a period of two thousand five hundred (2500) years."
	3. The noun and adjective "quinviginticentenary" means "a two thousand five hundred (2500) year anniversary."
	4. The adjective and noun "quinviginticentenary" means "two thousand five hundredth (2500th) in rank or order."
quinviginticentennial	1. The adjective and noun "quinviginticentennial" means "recurring every two thousand five hundred (2500) years."
	2. The adjective and noun "quinviginticentennial" means "lasting two thousand five hundred (2500) years."
	3. The noun and adjective "quinviginticentennial" means "a two thousand five hundred (2500) year anniversary."
quinviginticentennium	The noun and adjective "quinviginticentennium" means "a period of two thousand five hundred (2500) years."
quinvigintillion	The noun and adjective "quinvigintillion" means multiplied by 10⁷⁸ in the American number naming system, but means multiplied by 10¹⁵⁰ in the Chuquet number naming system. See also Large Numbers.
quorum	The noun "quorum" means "the minimum number of members required to be present to conduct business." An organization or committee may establish a quorum, which by default is a majority of members.
rational fraction	A rational fraction is a rational number expressed as the ratio or fraction of one integer divided by another integer. Examples include 1/2, 3/6, 500/1000, -5/64, 0/19, 4/3, -475/1, etc. See also "Fraction."
rational number	A rational number is a real number that can be expressed as the ratio or fraction of one integer divided by another integer. Examples include 0, 1, -2, ¾, -5.678, 355/113, etc. See also "Rational Number."
real number	A real number is a number that can be represented as a decimal number of unlimited precision. The set of real numbers can be represented by a number line of infinite length. We use the real numbers to count and measure our physical world. See also "Real Number."
revo-	The nonstandard prefix "revo-" denotes a multiple of ten to the negative thirty-third power (10^-33 = 1E-33 = 0.000 000 000 000 000 000 000 000 000 000 001).
Sacred Ratio	The "Sacred Ratio" (symbol: φ {Greek lower case letter phi} ) is the irrational number that is one greater than its multiplicative inverse, i.e., φ = 1 + 1/φ = (1+5^½)/2 = approximately 1.618 033 988 750. The ancient Egyptians discovered the "Sacred Ratio" which they used extensively in architecture. The ancient Greeks treasured φ as their "Golden Ratio." The ancient Egyptians discovered φ, which they honored as their "Sacred Ratio." The ancient Greeks treasured φ as their "Golden Ratio." The ratio φ is used extensively in art and architecture. See also "The Golden Mean" and "Golden Ratio."
scarcely	The adverb "scarcely" means "only slightly more than a required minimum."
score	The noun and adjective "score" means "twenty (20)."
score and ten	The compound noun and adjective "score and ten" means "thirty (30)."
second	1. The adjective, adverb, and noun "second (2^nd or 2^d)" is the standard name for "the ordinal number that follows first (1^st)." "Second" corresponds with the cardinal number "two (2)." See also Number Names.
second	2. The noun "second" means "divided by sixty twice ((1/60)·(1/60) = 1/3,600)." In time measurement, a "second" is "one thirty-six-hundredth (1/3,600) of an hour" or "one eighty-six-thousand-four-hundredth (1/86,400) of a day." In angular measurement, a "second" (suffix symbol: -″ {double prime} ) is "one thirty-six-hundredth (1/3,600) of a degree (suffix symbol: -° {degree symbol} )" or "one one-million-two-hundred-ninety-six-thousandth (1/1,296,000) of a circle."
second banana	The compound noun and adjective "second (2^nd or 2^d) banana" means "a subordinate person."
second cousin	The compound noun "second (2^nd or 2^d) cousin" means "an individual sharing a common pair of great-grandparents with the referenced individual."
second cousin once removed	The compound noun "second (2^nd or 2^d) cousin once (1-time) removed" means "the child of a second cousin"
second cousin twice removed	The compound noun "second (2^nd or 2^d) cousin twice (2-times) removed" means "the grandchild of a second cousin"
Second World	The compound noun and adjective "Second (2^nd or 2^d) World" means "the current and former communist nations of the world." See origin note at "Third World."
secondary	The adjective and noun "secondary" means "second (2^nd or 2^d) in order or importance."
semi-	The Latin-based numeric prefix "semi-" means "one half (1/2)."
semi	The noun and adjective "semi" means "a tractor and trailer combination freight truck (the tractor and trailer are the two (2) halves (1/2) of the truck.)" See also "eighteen-wheeler (18-wheeler)," "octodecicycle," and "semitrailer."
semiannual	The adjective "semiannual" means "recurring every one half (1/2) year or every six (6) months."
semicentennial	1. The adjective and noun "semicentennial" means "recurring every fifty (50) years."
	2. The adjective and noun "semicentennial" means "lasting fifty (50) years."
	3. The noun and adjective "semicentennial" means "a fifty (50) year anniversary."
semidiurnal	The adjective "semidiurnal" means "recurring twice (2) per day."
semimonthly	The adjective "semimonthly" means "recurring twice (2) per month."
semitrailer	The noun and adjective "semitrailer" means "a freight trailer designed to be towed by a tractor in a combination freight truck (the tractor and semitrailer are the two (2) halves (1/2) of the truck.)" See also "eighteen-wheeler (18-wheeler)," "octodecicycle," and "semi."
semiweekly	The adjective "semiweekly" means "recurring twice (2) per week."
senary	1. The adjective and noun "senary" means "sixth (6^th) in order or importance."
senary	2. The adjective "senary" means "having six (6) parts."
septe-	The numeric prefix "septe-" me