This is meant to be a reading aid.  Please feel free to print it out or save it to your own hard drive or link to it from your own web site.  Being lazy, I only linked illustrations and photos to the pages they're in, not directly to the photo itself.

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Accolade  a light touch on the shoulder with the flat side of the sword or formerly by an embrace, done in the ceremony of conferring knighthood.  2. the ceremony itself.  Source [4]

Aigrette  a tuft of egret feathers  Source: Search Result Page

Alb   linen vestment with narrow sleaves, worn chiefly by priests Source [4]  Illustration

Altar plate Generally, all the metalware used in the celebration of
the mass including chalices, patens, thuribles, candlesticks and so on.
Often beautifully made of precious metals and jewels (fine donations from
noble and royal patrons to religious establisments and even better items for
looting in the sack of such establishments.  Katherine gives examples
of both events.)  Specifically, an altar plate is another term for a paten
(a sort of drip catcher held under a chalice by an assistant) and seems to
be more typically used now in witchcraft rituals. Source: [27]

Ambrosia  the ointment or perfume of the gods   2 : something extremely pleasing to taste or smell   Source: [2]

Ambulatory aisle  a sheltered place (as in a cloister or church) for walking   Source: [2]

Anathema  a ban or curse solemnly pronounced by ecclesiastical authority and accompanied by excommunication  Source: [2]

Antiphon  1 : a psalm, anthem, or verse sung responsively   2 : a verse usually from Scripture said or sung before and after a canticle, psalm, or psalm verse as part of the liturgy   Source: [2]

Apse  a projecting part of a building (as a church) that is usually semicircular in plan and vaulted  Source: [2]  Illlustration

Apsidal  of or relating to an apse  Source: [2]

Arming doublet  Quilted garment worn under armour from the early fifteenth century, equipped with points to attach mail gussets and pieces of armour. Source [3] Photo

Arming points  Ties (usually of flax or twine) by which armour was secured in place.  Source [3]

Arras   a wall hanging or screen of tapestry   Source: [2]

Aspergillum   a brush or small perforated container with a handle that is used for sprinkling holy water in a liturgical service  Source: [2]

Assizes court   in law, a session, or sitting, of a court of justice. It originally signified the method of
 trial by jury that superseded the barbarous judicial combat. During the Middle Ages the
 term was applied to certain court sessions held in the counties of England  Source: [2]

Aumbry (niche) Also called armarium. Eccles.a recess in the wall of a church or a cupboard in the sacristy where sacred vessels, books, vestments, etc., are kept. Source [4]

Bairn  (pronounced barn) chiefly Scottish: child  Source: [2]

Baldric an often ornamented belt worn over one shoulder to support a sword or bugle Source: [2] Photo

Banns  public announcement especially in church of a proposed marriage   Source: [2]

Barb  any of a northern African breed of horses that are noted for speed and endurance and are related to Arabians   Source: [2]Photo

Barbican a tower or other fortification on the approach to a castle or town, especially one at a gate or drawbridge. Source: [24 ]

Bard, or Barding A term for horse armor, which could be made from a variety of materials, including mail and plate. Source: [1]

Basilard a medieval dagger having a tapering blade with straight transverse quillons and a T-shaped pommel. Source [4]

Basilica   an early Christian church building consisting of nave and aisles with clerestory and a large high transept from which an apse projects  Source: [2]

Battle Axe essentially larger version of simple axes and are usually two-handed and double-headed   Source [18]Illustration

Battlement a parapet with open spaces that surmounts a wall and is used for defense or decoration  Source: [2]

Bier   a stand on which a corpse or coffin is placed; also : a coffin together with its stand
Source: [2]

Bloodstone  green jasper dotted with bright red spots of iron oxide, was treasured in ancient times  See Jewelry  Photo

Boon  1. something to be thankful for; blessing; benefit.   2. something that is asked; a favor sought. 3. jolly; jovial; convivial: boon companions.

Border Bonnet Fabric head-dress (usually of tartan-patterned wool cloth)
used to help identify members of particular clans in battle.  Now a very
elaborate thing with feathers and decorative pins and so on.  Obviously once
functional (both for ID and for warmth), it is now a very snazzy affair indeed. Modern day Border Costume provided by Michael Barnard. [27]

Bower  a lady's boudoir in a medieval castle.  Source [4]

Braw  chiefly Scottish : good, fine   Source: [2]

Breeks (chiefly Scottish) Breeches: short pants covering the hips and thighs and fitting snugly at the lower edges at or just below the knee  Source: [2]

Breviary a book of the prayers, hymns, psalms, and readings for the canonical hours  Source: [2]

Brigand  one who lives by plunder usually as a member of a band/ bandit  Source: [2]

Brigandine   A flexible body defence consisting of a large number of metal plates riveted inside a cloth covering. Source [3] Photo

Broadsword a large heavy sword with a broad blade for cutting rather than thrusting Source: [2]

Brocade fabric woven with an elaborate design, esp. one having a raised overall pattern. Source [4]

Burse  A flat, square container of cloth, the same color as the vestments, in which the corporal is  carried to and from he altar. It is placed over the veil on top of the chalice. Source [17]Illustration

Cabochon A stone cut with a smooth, rounded surface, with no facets and highly polished. . Source:  [1]Photo

Caïque   Pronunciation: (kä-Ek'),  1. a single-masted sailing vessel used on the eastern Mediterranean Sea, having a sprit mainsail, a square topsail, and two or more other sails.
2. a long, narrow rowboat used on the Bosporus.  Source [4]

Cairngorm  tea-colored quartz found in the highlands of Scotland  Photo

Canonicals  the vestments prescribed by canon for an officiating clergyman  Source: [2]

Canter  an easy gallop  Source [4]

Cantle  The rear part of the saddle, usually quite strong and high to support the rider  Source: [12]

Capelet   a small cape usually covering the shoulders  Source: [2]

Canonization  to declare (a deceased person) an officially recognized saint   Source: [2]

Caralighter Like you I sort of suspect she made up this word.  But I
have a vague memory of Prince Caspian's ship, the Dawn Treader (in C. S.
Lewis's novel, "The Voyage of the Dawn Treader") also being called a
caralighter.  I think it is a wider, fatter ship with both sails and oars but also a
fighting castle and cabins below deck as well as some cargo capacity.  Not
really a fighting ship (unlike a galley).  I've attached a picture of the
Dawn Treader [27]

Cassock a close-fitting ankle-length garment worn especially in Roman Catholic and Anglican churches by the clergy and by laymen assisting in services  Source: [2] Illustration

Catafalque  a raised structure on which the body of a deceased person lies or is carried in state. Source [4]

Cateran  a former military irregular or brigand of the Scottish Highlands  Source: [2]

Cavalcade  a procession of persons riding on horses, in horsedrawn carriages  Source [4]

Clerestory the upper part of the nave, transepts, and choir of a church, containing windows.  [24 ]

Celtic Interlace   is a design made up of a band or group of bands of patternwork which,
 like a woven thread, pass alternately over and under one another as it (or they) loop and
 knot around one another. Source [10]

Censer  See Thurible.

Chalice  A cup of precious metal (the inside must be gold or gold-plated), that holds the wine consecrated at Mass.  Source [17]Illustration

Chalice Veil   A cloth covering, of the same color as the Chasuble, that conceals the chalice and paten up  to the Offertory and after Communion  Source [17] Illustration

Chamberlain   1: a priest having a rank of honor below domestic prelate  Source: [2]
 2: An officer of the royal household. He is responsible for the Chamber, meaning  that he controls access to the person of the King. He is also responsible for  administration of the household and the privates estates of the king. Source [7]

Chancery  a record office for public archives or those of ecclesiastical, legal, or diplomatic proceedings  Source: [2]

Chausses  Mail protection for the legs, either in the form of mail hose or strips of mail laced round
 the front of the leg. Source [3]

Ciborium  A large cup of precious metal with a cover of the same material, that contains the hosts consecrated for distribution to the Faithful in Holy Communion.  Source [17]Illustration

Cincture  a belt or girdle  Source [4]Illustration

Cipher  see cypher

Circle Bransle  a country dance  Source: Search result page.

Clark   Clerk   Source [4]

Client state  a country that is dependent on a larger and more powerful country for its political,  economic, or military welfare.   Source [4]

Cloister 1 a : a monastic establishment b : an area within a monastery or convent to which the religious are normally restricted c : monastic life
 2 : a covered passage on the side of a court usually having one side walled and the other an open arcade or colonnade (cloister garden) Source: [2] Photo

Close-coupled  Short backed  Source: search result page

Cockade  a rosette, knot of ribbon, etc., usually worn on the hat as part of a uniform, as a badge of office, or the like.  Source [4]

Coif  A hood, usually of mail; by the twelfth century it often incorporated a ventail. Source [3]  Photo

Colloquia  an academic seminar on a broad field of study usually led by a different lecturer at each meeting  Source [24]

Colonnade  a row of columns usually supporting a roof.  Source [4]

Compline (canonical hour) (around 7-8 pm)  Source [21]

Consanguineous  of the same blood or origin; specifically : descended from the same ancestor  Source: [2]

Consanguinity  1 : the quality or state of being consanguineous   2 : a close relation or connection   Source: [2]

Cope a long enveloping ecclesiastical vestment  Source: [2]

Corporal   The linen cloth spread by the priest on the altar at the beginning of Mass. The chalice and host rest upon this cloth.  Source [17]

Corslet  Also spelt corselet. A light half-armour popular in the sixteenth century for general
  military use (for example, town guards). It consisted of a gorget, breast, back and tassets, full
  arms and gauntlets; the term can also be applied to the cuirass only. Source [3]

Cotta  a short surplice, sleeveless or with short sleeves, worn esp. by choristers.  Source [4] Illustration

Coursers  Hot Blooded Speedster see: Equine

Cowl   a hood or long hooded cloak especially of a monk  Source: [2]

Cressets   an iron vessel or basket used for holding an illuminant (as oil) and mounted as a torch or suspended as a lantern   Source: [2]

Crouper  (Middle English)  The rump of a horse   Source:  search result page

Crozier a staff resembling a shepherd's crook carried by bishops and abbots as a symbol of office Source: [2]

Crucifer  a person who carries a cross, as in ecclesiastical processions.  Source [4] Illustration

Crupper  Defence for a horse's rump. Source [3]

Cuirass/coracia Armor for the upper half of the body which could be made of several materials, and which usually protected the arms as well as the torso.  Source: [1]
Cuirass  Also called pair of curates. A backplate and breastplate designed to be worn together. Source [3]

Curia  a court: either a judicial body or simply an entourage about a ruler.  Source [7]

Curragh a small rounded boat made of waterproof material stretched over a wicker or wooden frame. (coracle) Source: [24 ]
 

Curvet  a prancing leap of a horse in which the hind legs are raised just before the forelegs touch the ground  Source: [2]

Cypher one that has no weight, worth, or influence  Source: [2]   (when referring to Dhugal)

Cypher  Monogram   Source [4]  (when referring to Kelson's pennon)

Dais  a raised platform (as in a hall or large room)  Source: [2]

Damask  a firm lustrous fabric (as of linen, cotton, silk, or rayon) made with flat patterns in a satin weave on a plain-woven ground on  jacquard looms  Source: [2]

Defile a narrow passage or gorge  Source: [2]

Destriers  War horses.  see  Equine

Diocese All congregations within a given geographical area under the authority of the same bishop and are organized in accordance with the canons of the Church.  Source: [16]

Dirk  Scottish dagger  Source [4]Photo

doublet/wams  Short overgarment, a variation of the pourpoint. Originally it was worn under the pourpoint, and could be cut with or without sleeves.  Source: [1]

dowsing  to use a divining rod to find water  Source: [2]

Embrasure 1 : an opening with sides flaring outward in a wall or parapet of a fortification usually for allowing the firing of cannon     2 : a recess of a door or window   Source: [2]

Episopal   1 : of or relating to a bishop  2 : of, having, or constituting government by bishops  Source: [2]

Episcopate   1 : the rank, office, or term of bishop  2 : the body of bishops (as in a country)   Source: [2]

Escheat  The right of a feudal lord to the return of lands held by his vassal, or the holding of a serf, should either die with out lawful heirs or suffer outlawry.   Source [7]

Etoilles see Estoiles in Heraldic Terms.  Source: [1]

Excommunication  an ecclesiastical censure depriving a person of the rights of church membership  Source: [2]

Faggots a bundle of sticks  Source: [2]

Fealty 1 a : the fidelity of a vassal or feudal tenant to his lord b : the obligation of such fidelity  Source: [2]

Fetlock 1 a projection bearing a tuft of hair on the back of the leg above the hoof of a horse 2: the joint of the limb at the fetlock  Source: [2]

Fie   used to express disgust or disapproval  Source: [2]

Fête  a day of celebration; holiday:  2. a religious feast or festival   Source [4]

Freshet  a freshwater stream flowing into the sea. Source [4]

Gainsay  1. to deny, dispute, or contradict.   2. to speak or act against; oppose.  Source [4]

Galley  long, narrow vessel widely used in ancient and medieval times,  propelled principally by oars but also fitted with sails.  Source [4]

Gaoler  Jailer  Source: [2]

Garderobe  Privy/toilette  Photo

Garron  Highland pony   Photo

Gauntlets Mail or plate defences for the hand. Source: [1]

Gavotte  a dance of French peasant origin marked by the raising rather than sliding of the feet  Source: [2]

Gerfalcon  a large falcon, Falco rusticolus, of arctic and subarctic regions, having white, gray,  or blackish color phases  Source [4]

Gillie   a male attendant on a Scottish Highland chief  Source: [2]

Gorget/Gorgiere(fr) A plate armor defense designed to protect the neck (french gorge = throat). Source: [1]

Great Kilt Wrapping and Wearing the Great Kilt (a 'how to' site)

Great sword Term for a sword that was sufficiently long and heavy that it required two hands. Usually designed for cutting, but later also modified for thrusting into the gaps of plate armor.
Source: [1]

Greaves/jambard Plate pieces to protect the lower leg, usually in front, then later in back as well. Source: [1]

Hanaper a cup or bowl. Source: [24 ]

Hauberk A mail shirt that varied in length, but in the fourteenth century usually did not reach the knees. Source: [1]Photo

Harridan   Shrew   Source: [2]

Hand-and-a-half sword   a term used to describe a sword wielded by one or both hands.  Source: [12]Photo

Headstall   part of a bridle that fits over the horse’s head  Source:  Search result page

Hieromonk  a monk who is also a priest.  Source [4]

Hilt The lower portion of a sword consisting of the cross-guard, handle/grip, and pommel (most Medieval swords have a straight cross or cruciform-hilt). Source [5]

Iconostasis  a partition or screen on which icons are placed, separating the sanctuary from the main part of the church.  Source [4]

Interdict  a Roman Catholic ecclesiastical censure withdrawing most sacraments and Christian burial from a person or district  Source: [2]

Interregnum   an interval of time between the close of a sovereign's reign and the accession of his or her normal or legitimate successor.  Source [4]

Jambard See greaves.

Jazerant  A coat of defense made of small plates of metal sewed upon linen or the like; also, this kind of armor taken generally; as, a coat of jazerant. Source: ?

Jerkin  a close-fitting hip-length usually sleeveless jacket  Source: [2]

Jubba long outer garment worn by Muslims. Illustration.

Keep  strong stone tower. A citadel  or strong point, normally with  a vaulted basement, hall, and additional stories. Often with  very thick walls, a flush  parapet, and mural chambers. Source [13]

Keffiyeh  see Qiffieh

Lady-in-waiting  a lady who is in attendance upon a queen or princess  Source [4]

Laird  (pronounced lard) chiefly Scottish : a landed proprietor  Source: [2]

Lance  a long wooden shaft with a pointed metal head, used as a weapon by knights and cavalry soldiers in charging.  Source [4]

Lancer  a cavalry soldier armed with a lance.  Source [4]

Lauds (canonical hour) at daybreak  Source [21]

Leal  chiefly Scottish--loyal, true  Source: [2]

Leman   Mistress  Source: [2]

Liege a : having the right to feudal allegiance or service <his liege lord> b : obligated to render feudal allegiance   Source: [2]

Liturgy  The ritual, ceremonial, and other activities associated with formal worship Source: [16]

Livery  the distinctive clothing or badge formerly worn by the retainers of a person of rank b : a servant's uniform  Source: [2]

Longsword A sword that had the length of a greatsword, but which could be used in either one or two hands. Alternately called a "bastard sword" or "hand and a half sword." Source: [1]

Man-at-arms  A soldier holding his land in exchange for military service.  Source [7]

Manchet bread Fine bread made from the best wheat and the whitest flour available. Made in small loaves weighing 6 to 8 oz. Manchet was the bread of the privileged.  Source [9]

Mantle Here used to indicate a part of royal costume, a long and loose cloak, often trimmed with ermine, and clasped with a cloakpin in the middle. Source: [1]

Matins  (canonical hours) in the middle of the night (split into three parts, at 9 pm, midnight, and 3 am)  Source [21]

Miniver  a white fur worn originally by medieval nobles and used chiefly for robes of state
Source: [2]

Mitre  1. the official headdress of a bishop in the Western Church, in its modern form a tall cap with a top deeply cleft crosswise, the outline of the front and back resembling that of a pointed arch.
 2. the office or rank of a bishop; bishopric.  Source [4]Photo

Moue  (pronounced moo)  a pouting grimace. Source [4]

Murder holes   gateway or part of a  gatehouse over an entrance  passage, popularly thought  to be used for dropping  missiles or shooting weapons at besiegers, but more probably for dropping water  over the wooden parts of the gates  Source [13]

Nabila  Princess  Source: KKB appendix

Narthex 1 : the portico of an ancient church   2 : a vestibule leading to the nave of a church
Source: [2] Illustration

Nasal  Plate defence on early medieval helmets to cover the nose and middle of the face.
Source: [12]

Nave The main body of the church in which the congregation sits during worship services.
Source: [16] Illustration

Newel  the central support for a spiral  stair (see also Turnpike stair) Source [13] Photo

Niche   a vertical recess in a wall,  often to take statue  Source [13]

Nones (canonical hour)  one of the four 'little hours' (around 3 pm)  Source [21]

Office   a prescribed form or service of worship  Source: [2]

Onyx  chalcedony quartz (black)   Source: search result page Photo

Orans  (Orant) a representation of a female figure, with outstretched arms and palms up in a gesture
 of prayer, in ancient and early Christian art.  Source [4]

Oratory  a small private domestic chapel

Oriel window  projecting curved or  polygonal windows  Source [13]

Padishah  Emperor, shah  Source [8]

Paean   a joyous song or hymn of praise, tribute, thanksgiving, or triumph  Source: [2]

Palfrey  Everyday Ambler  see Equine

Pall  A small square of stiffened linen, or of cardboard covered with linen, used to cover the chalice.   Source [17]Illustration

Pall   a cloth, often of velvet, for spreading over a coffin, bier, or tomb  Source [4]

Pallet  1 : a straw-filled tick or mattress  2 : a small, hard, or temporary bed  Source: [2]

Panagia  1.  an encolpion (icon) bearing the image of the Virgin Mary.  Source [4]

Parapet 1 : a wall, rampart, or elevation of earth or stone to protect soldiers
 2 : a low wall or railing to protect the edge of a platform, roof, or bridge -- called also parapet wall  a prescribed form or service of worship

Paraph   a flourish at the end of a signature  Source: [2]

Paten   A small plate of precious metal that holds the sacred Host. Source [17]  Illustration

Pater Noster  The Lord's Prayer    Source: Search result page.

Pavanetta A variant of the word pavane, the -etta suffix means small
in Italian.  A pavane is a very formal court dance in the Renaissance characterised by intricate footwork and elegant mannerisms.  Not a highland
or country dance.  Kelson would probably know the steps (Conall certainly
would!) but the Dhugal of "The Bishop's Heir" most probably would not.
Here is a link to site that has the steps for a pavane laid out. [27]
http://www.pavanedance.org/dances.html

Pennons a long usually triangular or swallow-tailed streamer typically attached to the head of a lance as an ensign   Source: [2]Illustration

Perfidy  an act or an instance of disloyalty  Source: [2]

Phalanx  a body of heavily armed infantry in ancient Greece formed in close deep ranks and files  Source: [2]

Pharos  a lighthouse. Source:  [24 ]

Physick  cheap liquor mixed with herbs  Source: Search result page

Pike  a shafted weapon having a pointed head, formerly used by infantry   Source [4]

Pikemen  soldiers armed with a pikes.  Source [4]

Pommel Weight on the handle of a sword, used to balance the weapon and for striking ("Pummelling"). Source: [1]

Pommel  On a saddle, the front upper 'curl' of the saddle bow.  Source: [12]

Pontificals  1 : episcopal attire; specifically : the insignia of the episcopal order worn by a prelate when celebrating a pontifical mass -- usually used in plural
 2 : a book containing the forms for sacraments and rites performed by a bishop   Source: [2]

Portcullis  heavy timber or metal grill that protected the castle entrance and could
 be raised or lowered from within the castle. It dropped vertically between grooves to
 block passage or barbican, or to trap attackers.  Source [20]

Posset a hot drink of sweetened and spiced milk curdled with ale or wine   Source: [2]

Postern Gate   side or less important gate into a castle; usually for peacetime use
 by pedestrians  Source [20]

Prelate  an ecclesiastic (as a bishop or abbot) of superior rank  Source: [2]

prie-dieu  a kneeling bench designed for use by a person at prayer and fitted with a raised shelf on which the elbows or a book may be rested  Source: [2] Illustration

Primate  The Bishop with pastoral and administrative responsibility and authority for a group of dioceses that constitute a Church. A primate is sometimes called a metropolitan. The Presiding Bishop in the case of the Episcopal Church, and the Archbishop of Canterbury in the case of the Church of England and the Anglican Communion. Source: [16]

Prime (canonical hours)  one of the 'little hours' (around 6 am)  Source [21]

Progress  a royal journey marked by pomp and pageant.  Source: [2]

Provost  the chief dignitary of a cathedral or collegiate church. Source [4]

Purificator  A small linen cloth used by the priest to dry his fingers and the chalice, when he has washed and purified them after Communion. Source [17] Illustration

Pyx   the box or vessel in which the reserved Eucharist or Host is kept.  Source [4]

Qiffieh/Keffiyeh  an Arab headdress for men (ed. and women); made from a diagonally folded square of cloth held in place by an agal wound around the head  Source [4]

Quarterstaff a long stout staff formerly used as a weapon and wielded with one hand in the middle and the other between the middle and the end.  Source: [2]

Quillions A term for the two cross-guards (forward and back) whether straight or curved. It is likely from an old French or Latin term for a reed. On Medieval swords the cross guard may be called simply the "cross", or just the "guard". Source [5] Photo of a hand-and-a-half sword

Rangers one of a body of organized armed men who range over a region especially to enforce the law b : a soldier specially trained in close-range fighting and in raiding tactics  Source: [2]

Recurve bow  A bow where the limbs bend away from the archer when held in the firing position.  Source: [2]

Rector A full-time priest elected by a Vestry with the Bishop's approval, thereby having tenure. The
responsibility for the conduct of worship and the spiritual jurisdiction of the Parish are vested in the
Rector, subject to the Rubrics of the Book of Common Prayer, the Constitution and Canons of the
Episcopal Church and the Diocese, the pastoral direction of the Bishop, and the Religious
Corporation Laws of the State of New York. Source: [16]

Rectory  The residence provided for the rector. Source: [16]

Refectory  a dining hall (as in a monastery or college)  Source: [2]

Regalia the emblems and symbols of regal authority, such as the crown, sceptre, orb, finger rings, etc. Source: [1]

Regency   one who governs a kingdom in the minority, absence, or disability of the sovereign  Source: [2]

Reivers Raids.  Scottish, before 12th Century  Source: [2]

Rerebrace  Piece of armour covering the upper arm from the elbow to the shoulder. Source [3]

Ring brooch – a type of brooch in the form of a complete ring to which is usually hinged a horizontal pin slightly longer than the diameter of the brooch. The point of the pin rests on the ring opposite the hinge, and the brooch is worn by pulling the fabric up inside the ring, passing the pin through it twice and then drawing the fabric down so that it holds the pin in place. Source: [1] Photo (Also Pennanular Brooch)

Robe A whole set of clothes, usually composed of at least three parts: under-uppergarment and cloak. With the appearance of fourteenth-century dress variations, hoods, capes, etc. were added to it. Source: [1]

Rood screen  a screen, often of elaborate design and properly surmounted by a rood, separating
 the nave from the choir or chancel of a church.  Source [4]

Rouncy  or sumpter horse, which carried the baggage. Usually smaller and heavier, not well suited for riding long distances, yet with good endurance. Modern equivalents would probably be small cobs. If palfreys were the sports car equivalent, rounceys were the bicycle.  #26

Rowel  a revolving disk with sharp marginal points at the end of a spur (rowelling- to goad with or as if with a rowel)  Source: [2]

Rush  any of various monocotyledonous often tufted marsh plants with cylindrical often hollow stems which are used in bottoming chairs and plaiting mats   Source: [2]

Rushlights  a candle that consists of the pith of a rush dipped in grease  Source: [2]

Sacring  hallowing; consecration; ordination. sacring bell, bell rung at moment of elevation of the Host.  Source [8]

Sacristy a room in a church where sacred vessels and vestments are kept and where the clergy vestsSource: [2]

Saining   to make the sign of the cross on (oneself)/ Bless  Source: [2]

Salaam aleikum  means roughly "And upon you the peace."  Source: Search result page.

Saltire cross  diagonal, equal-limbed cross.  Source [20]

Sanctuary   The part of a church around the altar.  Source [16]

Saracen  a member of a nomadic people of the deserts between Syria and Arabia  Source: [2]

Saracen blade  See Scimitar.

Sarcenet  a soft thin silk in plain or twill weaves.  Source [11]

Scapular girt  a long wide band of cloth with an opening for the head worn front and back over the shoulders as part of a monastic habit  Source: [2]

Sceptre (from Greek skeptron) - a part of royal insignia, developed from a simple staff. A symbol of spiritual and worldly power. In the Middle Ages two forms were distinguished: a long staff (baculum), otherwise called rod, and a short one (sceptrum), although their meaning was identical. Source: [1]

Schola  Latin for school  Source [24]

Scimitar  (Saracen blade) a curved, single-edged sword of Oriental origin.  Source [4] Photo

Scion descendent, child  Source: [2]

Scourge is a short whip with several leather tails or thongs. Source: [2]

Scrip  a small bag or wallet  Source: [2]

Scrying  "Art" of seeking (or purporting to seek) information about occult matters or the future by looking at a candle flame, a transparent object, or somethiing with a reflective surface.  The word scry comes from descry, which means 'to catch sight of'.  Source [24]

See  (pronounced zay) 1: a seat of a bishop's office, power, or authority   2 : the authority or jurisdiction of a bishop   Source: [2]

Seneschal  an officer having full charge of domestic arrangements, ceremonies, the administration  of justice, etc., in the household of a medieval prince  Source [4]

Septuagesima is a period of three weeks of preparation before Lent.  Source [21]

Sergeant  A servant who accompanies his lord to battle, or a horseman of lower status used as light cavalry.  Source [7]

Serried  pressed together or compacted, as soldiers in rows  (serried saints)  Source [4]

Sett  The specific number of threads in a tartan, and their colors.

Sext (canonical hour)  one of the four 'little hours' (around noon)  Source [21]

Sigil    a sign, word, or device held to have occult power in astrology or magic   Source: [2]

Signet   a small intaglio (engraving) seal (as in a finger ring)   Source: [2]

Silver Samite  a rich medieval silk fabric interwoven with gold or silver   Source: [2]

Singlet  [from its having only one thickness of cloth] chiefly British : undershirt  Source: [2]

Sirdukar Another "made" word.  Katherine seems to use is to indicate soldier-servant in the Torenthi court in "King Kelson's Bride."  Comparisons: From Frank Herbert's "Dune" the term "Sardaukar: The soldier-fanatics of the Padishah Emperor. They were mene from an enviromental background of such ferocity that it killed six out of thirteen persons before the age of eleven. Their miilitary training emphasised ruthlessness and a near-suicidal disregard for personal safety. They were taught from infacy to use cruelty as a standard weapon, weakening enemies with terror." I think that's a little more intense than Katherine's meaning but the shared use of the term padishah (Torenthi sovereign's official title is telling).  Also, the word sirdar, the sherpa term for chief comes to mind -- possibly the common origin of both Kurtz's and Herbert's words!) [27]

Slubbed silk  ("slubs" are the small bumps in the fabric), which can be  made either of Tussah (wild) silk, or of silk waste.  Source:  search result page

Soi-disant  Pronunciation: "swä-dE-'zän"  self-styled, so-called  Source: [2]

Solar  The lord and lady's chamber, when situated on an upper floor, was called the solar. By
association, any private chamber, whatever its location, came to be called a solar. Source [15]

Stiletto  a slender dagger with a blade thick in proportion to its breadth   Source: [2] Photo

Stole  an ecclesiastical vestment consisting of a long usually silk band worn traditionally around the neck by bishops and priests and over  the left shoulder by deacons  Source: [2]Illustration

Stoup  a basin or font for holy water at the entrance of a church.  [24]

Sumpter  a pack animal  Source: [2]

Surcoat an outer coat or cloak; specifically : a tunic worn over armor Source: [2]

Surcot ouvert Developed in the middle of the fourteenth century from the universal upper garment of the previous century, the surcotte, it became the part of highly born ladies' wardrobes. It was cut with deep décolletage and armholes, and a separately cut loose and long skirt was seamed into the bodice part, which was named plackard. Source: [1]

Surplice  a loose-fitting, broad-sleeved white vestment, worn over the cassock by clergy and choristers.  Source [4]Illustration

Suzerain   a sovereign or a state exercising political control over a dependent state. Source [4]

Sweetmeats    a food rich in sugar: as a : a candied or crystallized fruit  Source: [2]

Synod   an ecclesiastical governing or advisory council   Source: [2]

Tabard   a short loose-fitting sleeveless or short-sleeved coat or cape: as a : a tunic worn by a knight over his armor and emblazoned with his  arms b : a herald's official cape or coat emblazoned with his lord's arms   Source: [2]

Tabernacle  an ornamental receptacle for the reserved Eucharist, now generally found on the altar.
  2. a canopied niche or recess, as for an image or icon.  Source [4]

Tanist  the successor apparent to a Celtic chief, usually the oldest or worthiest of his kin, chosen by election among the tribe during the chief 's lifetime.  Source [4]

Tanistry  the system among various Celtic tribes of choosing a tanist.  Source [4]

Targe a light shield used especially by the Scots  Source: [2]Photo

Tasset one of a series of jointed overlapping metal splints hanging from a corselet, used as armor for the lower trunk and thighs.  Source: [24 ]

Tattoo  a rapid rhythmic rapping  Source: [2]

Tau  the 19th letter of the Greek alphabet (T, tau).  Source [4]

Te Deum  abbreviation of te deum laudamus, 'we praise thee, O God'; n. ancient Christian hymn sung at morning service; any song of praise or thanks.  Source [8]

Tenne In heraldry, tenne is a rarely employed tincture considered as an orange colour or bright brown.   Source: Search results page

Temporal    lay or secular rather than clerical or sacred/civil  Source: [2]

Tesselate  to form of small squares or blocks, as floors or pavements; form or arrange in a checkered or mosaic pattern. Source [4]

Thurible (Censer)  vessel for burning incense; especially : a covered incense burner swung on chains in a religious ritual  Source: [2] Illustration

Tierce (canonical hour)  One of the four 'little hours' (around 9 am)  Source [21]

Tippet a long hanging part, as of a sleeve, hood, or cape. Source: [24 ]

Titular   existing or being such in title only; nominal; having the title but none of the associated duties, powers, etc.  Source [4]

Tonsure   the shaven crown or patch worn by monks and other clerics  Source: [2]

Torc  twisted metal neck piece worn as a symbol of  leadership of the clan.  Photo

Torse  a wreath of twisted silks Source [4] (It also has a heraldic meaning but doesn't apply to its use in KKB)

Transept  the part of a cruciform church that crosses at right angles to the greatest length between the nave and the apse or choir  Source [2]

Trencher  Meat was cut with daggers and all eating was done with the fingers from trenchers, or hollowed out husks of bread. One trencher was used by  two people.  Source [6]

Trews 1. tight-fitting trousers usually of tartan  2 : close-cut tartan shorts worn under the kilt in Highland dress  Source: [2]

Troika  a team of three horses driven abreast.  Source [4]

Tyrrit the old name for a swivel Turn tail, 2. To give up chasing quarry in mid-flight.  Source: [28]

Tunic  a simple slip-on garment made with or without sleeves and usually knee-length or longer, belted at the waist, and worn as an under or outer garment by men and women of ancient Greece and Rome  Source: [2]

Turnpike stair  spiral stair around a newel or central post (also newel stair)  Source [13] Photo

Tweed  a rough woolen fabric made usually in twill weaves and used especially for suits and coats   Source: [2]

Vambraces Plate defences for the lower arm. Source: [1]

Varlet 1. An attendant or servant. 2. A knight's page. Source: [24]

Vassal  a person under the protection of a feudal lord to whom he has vowed homage and fealty  Source: [2]

Versicle  a short verse or sentence (as from a psalm) said or sung by a leader in public worship and followed by a response from the people   Source: [2]

Vestibule  a passage, hall, or antechamber between the outer door and the interior parts of a
 house or building. Source [4]

Vespers (canonical hour)  (around 5-6 pm)  Source [21]

Vestry  The rector, wardens and vestry members of a parish. The Wardens and Vestry are the official representatives of the parish in the absence of a Rector. The Wardens have special roles and need the firm support of their Vestry colleagues.  Source [16]

Vet  to appraise, verify, or check for accuracy, authenticity, validity, etc.  Source [4]

Viceroy  the governor of a country or province who rules as the representative of a king or sovereign  Source: [2]

Vizier  a high official in certain Muslim countries and caliphates, esp. a minister of state. Source [4]

Vouchsafe  to give by way of reply  or  to grant as a privilege or special favor  Source: [2]

Wicket gate person-sized door set into the main gate door.  Source [20]

Wimple   a cloth covering worn over the head and around the neck and chin especially by women in the late medieval period and by some nuns   Source: [2]

Windlass  a device for raising or hauling objects, usually consisting of a horizontal cylinder or
 barrel turned by a crank upon which a rope, or chain winds, the outer end of the cable being attached directly or indirectly to the weight to be raised or the thing to be hauled or pulled; winch. (Used to open a portcullis)  Source [4]

Window embrasure Quite simply a windowed alcove off a larger room
usually with seats built in on either side of the side.  Such small, intimate
spaces provide a "private" space for conversation which must be nice for
people who inhabit the larger public spaces of a great house or royal court.
Remember that rooms such as great halls were usually jammed with people and even rooms we might consider private today such as Queen Jehana's solar in "Deryni Rising" would have been full of people (ladies-in-waiting, companions, and servants -- all of them eavesdropping!).  Embrasures provided privacy in an era which had not yet fully embraced the idea [27]

Withers: Point at the bottom of the horse's neck from which  the horse's height is measured.  Source http://horses.about.com/pets/horses/library/blglossaryW.htm?terms=withers

Warrior's knot In reference to a hair-style.  Much as Dhugal's border
braid pulls his longer, loose hair out of his face, a warrior's knot is a
tightly braid and woven hair-style meant to keep loose hair out a fighting man's
face (where it might obscure his vision or be grabbed as a handle by an opponent in close combat).  Also tightly woven hair is likely to be far more manageable under a helmet. [27]
 

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Heraldic Terms
 

Bordure A border round the edge of the shield. Source: [1]

Charge A bearing or figure represented on the shield. Source: [1]

Chequy, Checquy, or Checky A term applied to a field or charge divided into three or more rows of small squares of alternate tinctures like a chess board. Source: [1]

Colours The principle colours are blue (Azure), red (Gules), black (Sable), green (Vert), and purple (Purpure). Source: [1]

Coronet There are five different coronets of rank which may surmount the arms of British peers. The so-called ducal coronet, used either with or instead of a crest wreath, implies no rank, and the term crest coronet is preferred today. Source: [1]

Crescent  Crescent moon represents the second son  Source: [2]

Difference To make an addition or alteration to arms and crest, usually to mark a distinction between the coats of arms of closely related persons whose shields would otherwise be the same.  Source: [1]

Dormant A beast in a sleeping position. Source: [1]
 

Estoile A star with wavy limbs. (Spelled etoilles in The King's Justice)
Source: [1]

Fess The Ordinary is a band taking up the centre third of the escutcheon, and formed by two horizontal lines drawn across the shield.

Flory counterflory Denoting that the flowers with which an Ordinary (usually a tressure) is adorned have their heads placed inward and outward alternately, as in the Scottish Royal Arms.  Source: [1]

Griffin Winged monster with foreparts of an eagle and hindparts of a lion with a beard and ears. A male griffin has no wings, and spikes emerge from the body. Source: [1]

Guardant Used of a beast looking out at the spectator rather than seen in profile. Source: [1]

Gules Heraldic term for red. Source: [1]

Or Heraldic term for gold or yellow. Source: [1]

Pale The Ordinary. A vertical stripe in the middle of the shield occupying at most one third of the shield. Source: [1]

Particolor Source [22]

Quarter To divide the shield into four or more compartments of equal sizes.

Rampant Beast or monster standing on one hind leg. Source: [1]

Rampant Gardant - The same as rampant, but with the animal looking full-faced.  Source [14]

Roundel A circle. Source: [1]

Sable Heraldic term for black. Source: [1]

Saltire The Ordinary, depicted in the form of a St Andrew's Cross. Source: [1]

Segreant applied by most writers to the griffin instead of rampant. It includes the wings being
expanded.  Source [23]

Tenné  In heraldry, tenne is a rarely employed tincture considered as an orange colour or bright brown.   Source: Search results page

Tressure A diminutive of the orle appearing as a narrow band near the edge of a coat of arms, often ornamented with fleurs-de-lis, as in the Scottish Royal Arms. Source: [1]
 

When it says "Source: Search result page."  I mean that I found the answer from reviewing the first page of a search query without actually going to that page.

[1] Department of  Medieval Studies at Central European University,  Budapest.
[2] Britannica.com
[3] The Arador Armour Library
[4] Infoplease.com
[5] Historical Weapons
[6] Feudalism and Medieval life
[7] Glossary of Medieval Terms
[8] Dictionary of Difficult Words
[9] A Glossary of Cookery and other Items
[10]  Celtic Knotwork Designs
[11]  Leighton Smith's Fabric List
[12]  Arms and Armor of the Medieval Knight: An Illustrated History of Weapons in the Middle Ages by  David Edge & John Miles Paddock / Crescent Books
[13] Scottish Castle Glossary
[14]  Pemberly's Dictionary of Heraldry
[15] Life in a Medieval Castle
[16] The Diocese of New York
[17] The Domestic Church
[18] The Forge
[19]Knighthood, Chivalry & Tournament Glossary of Terms
[20]  Glossary of Castle Terms
[21] The Liturgical Year
[22] http://www.thewetlands.org/cos/ (invalid link)
[23]  http://www04.u-page.so-net.ne.jp/ta2/saitou/ie401/Jpglosss.htm (invalid link)
[24] http://www.dictionary.com
[25] http://www.AltmedDictionary/s.html (invalid link)
[26] http://www.geocities.com/Athens/Agora/1590/medieval.htm (invalid link)
[27] Micheal Barnard
[28] http://www.britishfalconersclub.co.uk/
[29]
[30]
 

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Here's the stuff I couldn't find.