<B>tricorn, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> having three horns or hornlike projections (applied especially to a cocked hat with the brim turned up on three sides). <DD><I>noun </I> a tricorn hat. </DL>
<A NAME="tricorne">
<B>tricorne, </B>noun.<DL COMPACT><DD> a tricorn hat. <BR> <I>Ex. It was Washington who wore a tricorne; Napoleon wore a bicorne (Atlantic).</I> </DL>
<B>tricorporate, </B>adjective.<DL COMPACT><DD> (Especially Heraldry.) having three bodies. </DL>
<A NAME="tricostate">
<B>tricostate, </B>adjective.<DL COMPACT><DD> (Botany, Zoology.) having three ribs or riblike parts (costae). </DL>
<A NAME="tricot">
<B>tricot, </B>noun.<DL COMPACT><DD><B> 1. </B>a knitted fabric of wool, cotton, rayon, nylon, or silk, made by hand or machine. <DD><B> 2. </B>a kind of woolen cloth. <DD><B> 3. </B>a close-fitting garment worn by ballet dancers. </DL>
<A NAME="tricotine">
<B>tricotine, </B>noun.<DL COMPACT><DD> a kind of twilled woolen fabric. </DL>
<A NAME="tricresylphosphate">
<B>tricresyl phosphate,</B><DL COMPACT><DD> a mixture of isomers derived from cresol and phosphorous oxychloride, used especially as a gasoline additive and plasticizer. (Abbr:) TCP (no periods). </DL>
<A NAME="tricrotic">
<B>tricrotic, </B>adjective.<DL COMPACT><DD> (of a pulse or a tracing of it) having or showing a three-fold beat. </DL>
<B>tricuspid, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> <B>1. </B>having three points or cusps. <DD><B> 2. </B>of or having to do with the tricuspid valve of the heart. <DD><I>noun </I> <B>1. </B>a tricuspid tooth. <DD><B> 2. </B><B>=tricuspid valve.</B> </DL>
<B>tricuspid valve,</B><DL COMPACT><DD> a valve of three segments opening from the right auricle into the right ventricle of the heart. It prevents blood from being forced back into the right auricle during contraction of the ventricles. </DL>
<A NAME="tricycle">
<B>tricycle, </B>noun, verb, <B>-cled,</B> <B>-cling.</B><DL COMPACT><DD><I>noun </I> <B>1. </B>a small, light vehicle having three wheels, worked by pedals or handles. Children often ride tricycles. <DD><B> 2. </B>a three-wheeled motorcycle. <DD><I>v.i. </I> to ride a tricycle. </DL>
<A NAME="tricycler">
<B>tricycler, </B>noun.<DL COMPACT><DD> a person who rides on a tricycle; tricyclist. </DL>
<A NAME="tricyclic">
<B>tricyclic, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> <B>1. </B>passing through or having three cycles. <DD><B> 2. </B>(Chemistry.) containing three rings of atoms in the molecule. <DD><I>noun </I> any one of a class of tricyclic compounds used as drugs to relieve depression. <BR> <I>Ex. Tricyclics ... help the people who get to sleep, but wake up at about three, seeing everything as a disaster (Listener).</I> </DL>
<A NAME="tricyclist">
<B>tricyclist, </B>noun.<DL COMPACT><DD> a person who rides on a tricycle. </DL>
<A NAME="tridactyl">
<B>tridactyl, </B>adjective.<DL COMPACT><DD> having three digits (fingers, claws, toes, or the like) on each limb. </DL>
<A NAME="tridecane">
<B>tridecane, </B>noun.<DL COMPACT><DD> a colorless, liquid hydrocarbon of the methane series. </DL>
<A NAME="trident">
<B>trident, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> <B>1. </B>a spear with three prongs, used for fishing. <DD><B> 2. </B>a three-pronged spear that is the identifying attribute of Poseidon (Neptune) as the ancient Greek and Roman god of the sea. <DD><B> 3. </B>a three-pronged spear that was one of the two weapons (the other being a net) of a retiarius in ancient Roman gladiatorial combat. <DD><I>adj. </I> three-pronged. </DL>
<A NAME="tridentate">
<B>tridentate, </B>adjective.<DL COMPACT><DD> having three teeth or toothlike points; three-pronged. </DL>
<B>Tridentine, </B>adjective.<DL COMPACT><DD><B> 1. </B>of or having to do with Trent, Italy (formerly Austria), or the Council of Trent. <DD><B> 2. </B>conforming to the doctrine of the Council of Trent. </DL>
<B>tridimensionality, </B>noun.<DL COMPACT><DD> the condition or quality of having three dimensions; three-dimensionality. </DL>
<A NAME="triduum">
<B>triduum, </B>noun.<DL COMPACT><DD><B> 1. </B>a period of three days. <DD><B> 2. </B>(in the Roman Catholic Church) a three-day period of prayer or devotion, preceding some feast. </DL>
<A NAME="tridymite">
<B>tridymite, </B>noun.<DL COMPACT><DD> a crystallized form of silica found in igneous rocks, usually in twinned groups of three crystals. </DL>
<B>tried, </B>adjective, verb.<DL COMPACT><DD><I>adj. </I> <B>1. </B>proved or tested by experience or examination; proven. <BR> <I>Ex. a person of tried abilities.</I> (SYN) dependable, reliable, trustworthy. <DD><B> 2. </B>(of fat) rendered. <DD><B> 3. </B>(Obsolete.) freed from impurities; refined. <DD><I>verb </I> the past tense and past participle of <B>try.</B> <BR> <I>Ex. I tried to call you. Have you tried calling again?</I> </DL>
<A NAME="triedandtrue">
<B>tried-and-true, </B>adjective.<DL COMPACT><DD> tested and found to be true over a period of time; proven; dependable. <BR> <I>Ex. He believed in the tried-and-true American virtues of honesty, thrift, and opportunity (Newsweek). The producer--rather than speculate on something risky and new--sticks to a tried-and-true formula based on the successes of the past (Harper's).</I> </DL>
<A NAME="triene">
<B>triene, </B>noun.<DL COMPACT><DD> (Chemistry.) a compound having three double bonds. </DL>
<A NAME="triennial">
<B>triennial, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> <B>1. </B>occurring every three years. <BR> <I>Ex. triennial elections.</I> <DD><B> 2. </B>lasting three years. <DD><I>noun </I> <B>1. </B>an event that occurs every three years. <DD><B> 2. </B>the third anniversary of an event. adv. <B>triennially.</B> </DL>
<A NAME="triennium">
<B>triennium, </B>noun, pl. <B>-ennia.</B><DL COMPACT><DD> a space or period of three years. </DL>
<A NAME="trier">
<B>trier, </B>noun.<DL COMPACT><DD> a person or thing that tries. </DL>
<A NAME="trierarch">
<B>trierarch, </B>noun.<DL COMPACT><DD> in ancient Greece: <DD><B> 1. </B>the commander of a trireme. <DD><B> 2. </B>(in Athens) a citizen who, singly or in conjunction with others, was charged with fitting out a trireme for the state. </DL>
<A NAME="trierarchic">
<B>trierarchic, </B>adjective.<DL COMPACT><DD> of or having to do with a trierarch or the trierarchy. </DL>
<A NAME="trierarchy">
<B>trierarchy, </B>noun, pl. <B>-chies.</B><DL COMPACT><DD><B> 1. </B>the command over a trireme. <DD><B> 2. </B>trierarchs collectively. <DD><B> 3. </B>(in Athens) the system of requiring citizens to equip triremes for the state. </DL>
<A NAME="tries">
<B>tries, </B>noun, verb.<DL COMPACT><DD><I>noun </I> plural of <B>try.</B> <DD><I>verb </I> the third person singular, present tense of <B>try.</B> <BR> <I>Ex. He always tries to do his best.</I> </DL>
<A NAME="triestine">
<B>Triestine, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> of or having to do with Trieste, Italy. <BR> <I>Ex. Triestine dialects.</I> <DD><I>noun </I> a native or inhabitant of Trieste. </DL>
<A NAME="trieteric">
<B>trieteric, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> (in ancient Greece) occurring or held every third year (in the ancient reckoning, every alternate year), as certain festivals. <DD><I>noun </I> a trieteric festival. </DL>
<A NAME="triethyl">
<B>triethyl, </B>adjective.<DL COMPACT><DD> (Chemistry.) containing three ethyl groups. </DL>
<A NAME="triethylamine">
<B>triethylamine, </B>noun.<DL COMPACT><DD> a colorless liquid with a strong smell like that of ammonia, used as a catalyst in organic reactions, as a solvent, and in certain propellants. </DL>
<A NAME="triethylenemelamine">
<B>triethylene melamine,</B><DL COMPACT><DD> a poisonous, crystalline compound used in manufacturing certain resins, in textile finishing, and as a drug in the treatment of malignant lymphomas and chronic leukemia. </DL>
<A NAME="triethylenephosphoramide">
<B>triethylene phosphoramide,</B><DL COMPACT><DD> a drug used in the treatment of certain forms of carcinoma, malignant melanoma and lymphoma, and chronic leukemia; TEPA. </DL>
<B>trifecta, </B>noun.<DL COMPACT><DD> (U.S.) a form of betting on a horse race in which the bettor picks the winners of the first, second, and third place in their order of finish. </DL>
<A NAME="trifid">
<B>trifid, </B>adjective.<DL COMPACT><DD> divided into three by clefts. </DL>
<A NAME="trifilar">
<B>trifilar, </B>adjective.<DL COMPACT><DD> consisting of or furnished with three filaments or threads. </DL>
