<B>triradius, </B>noun, pl. <B>-dii,</B> <B>-diuses.</B><DL COMPACT><DD><B> 1. </B>a junction of three lines at the base of each finger on the palm of the hand. <DD><B> 2. </B>a tiny triangle formed in fingerprints by ridges meeting at the corners. </DL>
<A NAME="triregnum">
<B>triregnum, </B>noun.<DL COMPACT><DD> the triple crown worn by the pope as a symbol of his position; tiara. </DL>
<A NAME="trireme">
<B>trireme, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> a ship, usually a warship, with three rows of oars on each side, one above the other. Triremes were used in ancient Greece and Rome. <DD><I>adj. </I> having three rows of oars. </DL>
<B>trisaccharide, </B>noun.<DL COMPACT><DD> any one of a class of carbohydrates, such as raffinose, which on hydrolysis yields three molecules of simply sugars (monosaccharides). </DL>
<A NAME="trisect">
<B>trisect, </B>transitive verb.<DL COMPACT><DD><B> 1. </B>to divide into three parts. <DD><B> 2. </B>to divide into three equal parts. </DL>
<A NAME="trisection">
<B>trisection, </B>noun.<DL COMPACT><DD><B> 1. </B>the division of a thing into three parts. <DD><B> 2. </B>(Geometry.) the division of a straight line or an angle into three equal parts. </DL>
<A NAME="trisector">
<B>trisector, </B>noun.<DL COMPACT><DD> a person or thing that trisects. </DL>
<A NAME="triseme">
<B>triseme, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> a metrical foot consisting of three short syllables. <DD><I>adj. </I> <B>=trisemic.</B> </DL>
<A NAME="trisemic">
<B>trisemic, </B>adjective.<DL COMPACT><DD><B> 1. </B>having three morae or short syllables. <DD><B> 2. </B>equivalent to three morae or short syllables. </DL>
<A NAME="trisepalous">
<B>trisepalous, </B>adjective.<DL COMPACT><DD> (Botany.) having three sepals. </DL>
<A NAME="triseptate">
<B>triseptate, </B>adjective.<DL COMPACT><DD> (Biology.) having three septa (partitions). </DL>
<A NAME="triserial">
<B>triserial, </B>adjective.<DL COMPACT><DD><B> 1. </B>arranged in three series or rows. <DD><B> 2. </B>(Botany.) having three floral whorls. </DL>
<B>triskelion, </B>noun.<DL COMPACT><DD> a symbolic figure consisting of three legs or lines radiating from a common center. </DL>
<A NAME="trismic">
<B>trismic, </B>adjective.<DL COMPACT><DD><B> 1. </B>of or having to do with lockjaw. <DD><B> 2. </B>having lockjaw. </DL>
<A NAME="trismus">
<B>trismus, </B>noun. <B>=lockjaw.</B></DL>
<A NAME="trisoctahedral">
<B>trisoctahedral, </B>adjective.<DL COMPACT><DD><B> 1. </B>bounded by twenty-four equal faces. <DD><B> 2. </B>having to do with a trisoctahedron. <DD><B> 3. </B>having the form of a trisoctahedron. </DL>
<A NAME="trisoctahedron">
<B>trisoctahedron, </B>noun, pl. <B>-drons,</B> <B>-dra.</B><DL COMPACT><DD> a solid bounded by twenty-four equal faces, every three of which correspond to one face of an octahedron. A trigonal trisoctahedron has twenty-four triangular faces and a tetragonal trisoctahedron has twenty-four quadrilateral or trapezoidal faces. </DL>
<A NAME="trisodiumphosphate">
<B>trisodium phosphate,</B><DL COMPACT><DD> a crystalline compound used as a detergent, metal cleaner, water softener, and in the manufacture of paper. </DL>
<A NAME="trisome">
<B>trisome, </B>noun.<DL COMPACT><DD> (Biology.) a trisomic condition. </DL>
<A NAME="trisomic">
<B>trisomic, </B>adjective.<DL COMPACT><DD> (Biology.) diploid except for one chromosome which is triploid. </DL>
<A NAME="trisomy">
<B>trisomy, </B>noun, pl. <B>-mies.</B><DL COMPACT><DD> (Biology.) a trisomic condition. <BR> <I>Ex. Trisomies can also occur by mutation (Scientific American).</I> </DL>
<A NAME="trispermous">
<B>trispermous, </B>adjective.<DL COMPACT><DD> (Botany.) containing three seeds. </DL>
<A NAME="trisporic">
<B>trisporic, </B>adjective.<DL COMPACT><DD> (Botany.) having three spores. </DL>
<B>tri-state, </B>adjective.<DL COMPACT><DD> (U.S.) of, belonging to, or involving three adjoining states or the adjoining parts of three such states. <BR> <I>Ex. The [New Jersey] legislature refused to grant legal status to a tri-state transportation committee which had already been approved by New York and Connecticut (Harper's).</I> </DL>
<B>tristeza, </B>noun.<DL COMPACT><DD> a virus disease of citrus trees that attacks sweet orange, tangerine, and scions of certain other related trees grafted on the rootstocks of the sour orange. </DL>
<B>tristich, </B>noun.<DL COMPACT><DD> the lines of verse forming a stanza or group. </DL>
<A NAME="tristichous">
<B>tristichous, </B>adjective.<DL COMPACT><DD><B> 1. </B>arranged in three rows or ranks. <DD><B> 2. </B>characterized by three rows or ranks. <DD><B> 3. </B>(Botany.) arranged in three vertical rows or ranks. </DL>
<A NAME="tristram">
<B>Tristram, </B>noun.<DL COMPACT><DD> one of the most famous knights of the Round Table in Arthurian legends. His love for Iseult, wife of King Mark, is the subject of many stories and poems and of an opera by Richard Wagner. Also, <B>Tristan.</B> </DL>
<A NAME="tristylous">
<B>tristylous, </B>adjective.<DL COMPACT><DD> (Botany.) having three styles. </DL>
<A NAME="trisulcate">
<B>trisulcate, </B>adjective.<DL COMPACT><DD><B> 1. </B>(Botany.) having three sulci or grooves. <DD><B> 2. </B>(Zoology.) divided into three digits, as a foot. </DL>
<A NAME="trisulfid">
<B>trisulfid</B> or <B>trisulphid, </B>noun. <B>=trisulfide.</B></DL>
<A NAME="trisulfide">
<B>trisulfide</B> or <B>trisulphide, </B>noun.<DL COMPACT><DD> a compound containing three atoms of sulfur combined with another element or radical. </DL>
<A NAME="trisyllabic">
<B>trisyllabic, </B>adjective.<DL COMPACT><DD> having three syllables. </DL>
<B>trisyllabically, </B>adverb.<DL COMPACT><DD> as or in three syllables. </DL>
<A NAME="trisyllable">
<B>trisyllable, </B>noun.<DL COMPACT><DD> a word of three syllables. <I>Educate</I> is a trisyllable. </DL>
<A NAME="trit">
<B>trit.,</B><DL COMPACT><DD> triturate. </DL>
<A NAME="tritagonist">
<B>tritagonist, </B>noun.<DL COMPACT><DD> the third actor in an ancient Greek tragedy, next in importance after the deuteragonist. </DL>
<A NAME="tritanope">
<B>tritanope, </B>noun.<DL COMPACT><DD> a person who suffers from tritanopia. </DL>
<A NAME="tritanopia">
<B>tritanopia, </B>noun.<DL COMPACT><DD> a form of color blindness, the inability to distinguish violet, blue, green, and to some extent, yellow. </DL>
<A NAME="tritanopic">
<B>tritanopic, </B>adjective.<DL COMPACT><DD> of or havingto do with tritanopia. <BR> <I>Ex. tritanopic vision.</I> </DL>
<A NAME="trite">
<B>trite, </B>adjective, <B>triter,</B> <B>tritest.</B><DL COMPACT><DD> worn out by constant use or repetition; no longer new or interesting; commonplace; hackneyed. <BR> <I>Ex. "Cheeks like roses" is a trite expression.</I> (SYN) stereotyped, banal, stale. adv. <B>tritely.</B> noun <B>triteness.</B> </DL>
<A NAME="tritheism">
<B>tritheism, </B>noun.<DL COMPACT><DD> the belief in three Gods, especially the doctrine that the Father, the Son, and the Holy Ghost of the Christian Trinity are three distinct Gods. </DL>
<A NAME="tritheist">
<B>tritheist, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> a person who believes in tritheism. <DD><I>adj. </I> <B>=tritheistic.</B> </DL>
<A NAME="tritheistic">
<B>tritheistic, </B>adjective.<DL COMPACT><DD><B> 1. </B>of or having to do with tritheism. <DD><B> 2. </B>believing in tritheism. </DL>
<B>trithing, </B>noun.<DL COMPACT><DD> (Obsolete.) riding (2), an administrative division. </DL>
<A NAME="tritiate">
<B>tritiate, </B>transitive verb, <B>-ated,</B> <B>-ating.</B><DL COMPACT><DD> to mix, infuse, or coat with tritium. </DL>
<A NAME="triticale">
<B>triticale, </B>noun.<DL COMPACT><DD> a highly productive and nutritious hybrid grain produced by crossing wheat and rye. </DL>
<A NAME="tritium">
<B>tritium, </B>noun.<DL COMPACT><DD> an isotope of hydrogen, three times as heavy as ordinary hydrogen. It is the explosive used in a hydrogen bomb. </DL>
<A NAME="tritoma">
<B>tritoma, </B>noun, pl. <B>-mas.</B> <B>=red-hot poker.</B></DL>
<A NAME="triton">
<B>Triton, </B>noun.<DL COMPACT><DD><B> 1a. </B>(Greek Mythology.) a sea god, son of Poseidon and Amphitrite, having the head and body of a man and the tail of a fish and carrying a trumpet made of a conch shell. <DD><B> b. </B>(later) any one of a group of minor sea gods by whom Poseidon and the other major sea gods were served. <DD><B> 2. </B>the larger of the two satellites of Neptune. </DL>
<A NAME="triton">
<B>triton</B> (1), noun.<DL COMPACT><DD><B> 1. </B>any one of a family of large marine gastropods, especially any one of a group having a brightly colored, spiral, trumpet-shaped shell. <DD><B> 2. </B>the shell of such an animal. </DL>
<A NAME="triton">
<B>triton</B> (2), noun.<DL COMPACT><DD> the nucleus of a tritium atom. </DL>
<A NAME="tritone">
<B>tritone, </B>noun.<DL COMPACT><DD> (Music.) an interval consisting of three whole tones; augmented fourth. </DL>
<A NAME="tritoness">
<B>Tritoness, </B>noun.<DL COMPACT><DD> a female Triton. </DL>
<A NAME="tritonstrumpet">
<B>triton's trumpet,</B><DL COMPACT><DD> a triton shell used as a horn. </DL>
<A NAME="triturable">
<B>triturable, </B>adjective.<DL COMPACT><DD> capable of being triturated. </DL>
