<B>triangular, </B>adjective.<DL COMPACT><DD><B> 1. </B>shaped like a triangle; three-cornered. <DD><B> 2. </B>(Figurative.) concerned with three persons, groups, or interests; three-sided. <DD><B> 3. </B>constituting a triad or set of three; threefold. <DD><B> 4. </B>having to do with or relating to a triangle. <DD><B> 5a. </B>of or having to do with a pattern of organization formerly standard in the infantry and certain other combat branches of the armed forces of the United States and some other countries, in which a division consisted of three regiments, a regiment of three battalions, and so on. <DD><B> b. </B>characterized by such a pattern of organization. adv. <B>triangularly.</B> </DL>
<A NAME="triangularity">
<B>triangularity, </B>noun.<DL COMPACT><DD> the condition of being triangular; triangular form. </DL>
<A NAME="triangulate">
<B>triangulate, </B>verb, <B>-lated,</B> <B>-lating,</B> adjective.<DL COMPACT><DD><I>v.t. </I> <B>1. </B>to mark out or divide into triangles. <DD><B> 2. </B>to survey, measure, and map out (a region) by dividing (it) into triangles and measuring their angles and sides. <DD><B> 3. </B>to find out by trigonometry. <BR> <I>Ex. to triangulate the height of a mountain.</I> <DD><B> 4. </B>to make triangular; mark out or draw as a triangle. <DD><I>adj. </I> <B>1. </B>composed of triangles. <DD><B> 2. </B><B>=triangular.</B> adv. <B>triangulately.</B> </DL>
<A NAME="triangulation">
<B>triangulation, </B>noun.<DL COMPACT><DD><B> 1a. </B>a survey or measurement done by means of trigonometry. <DD><B> b. </B>the series or network of triangles laid out for such measurement. <DD><B> 2. </B>division into triangles. <DD><B> 3. </B>(Figurative.) any relationship that links three distinct things. <BR> <I>Ex. Women and death and airplanes: there was a comfortable triangulation there, he drowsily perceived (John Updike).</I> </DL>
<A NAME="trianguli">
<B>Trianguli, </B>noun.<DL COMPACT><DD> gentive of <B>Triangulum.</B> </DL>
<A NAME="trianguliaustralis">
<B>Trianguli Australis,</B><DL COMPACT><DD> genitive of <B>Triangulum Australe.</B> </DL>
<A NAME="triangulum">
<B>Triangulum, </B>noun, genitive <B>Trianguli.</B><DL COMPACT><DD> a northern constellation near Andromeda. </DL>
<A NAME="triangulumaustrale">
<B>Triangulum Australe, </B>genitive <B>Trianguli Australis.</B><DL COMPACT><DD> a southern constellation near Centaurus. </DL>
<B>triapsidal, </B>adjective.<DL COMPACT><DD> having three apses. </DL>
<A NAME="triarchy">
<B>triarchy, </B>noun, pl. <B>-archies.</B><DL COMPACT><DD><B> 1. </B>a government by three persons. <DD><B> 2. </B>three persons ruling jointly; triumvirate. <DD><B> 3. </B>a group of three districts or states, each under its own ruler. </DL>
<A NAME="trias">
<B>Trias, </B>noun.<DL COMPACT><DD> the Triassic system or period. </DL>
<A NAME="triassic">
<B>Triassic, </B>noun, adjective.<DL COMPACT><DD> (Geology.) <DD><I>noun </I> <B>1. </B>the earliest period of the Mesozoic era, before the Jurassic, characterized by the appearance of dinosaurs and primitive mammals, the domination of the earth by reptiles, and much volcanic activity. <DD><B> 2. </B>the rocks formed during this period. <DD><I>adj. </I> of or having to do with this period or its rocks. </DL>
<A NAME="triathlete">
<B>triathlete, </B>noun.<DL COMPACT><DD> a person who competes in a triathlon. </DL>
<A NAME="triathlon">
<B>triathlon, </B>noun.<DL COMPACT><DD> an athletic contest, modeled on the biathlon, combining swimming, bicycling, and running. <BR> <I>Ex. To complete Hawaii's triathlon, ... a competitor must swim 2.4 miles in the ocean, race the 112 miles around Oahu island on a bicycle, and then run a full 26.2-mile marathon (Wall Street Journal).</I> </DL>
<A NAME="triaticstay">
<B>triatic stay,</B><DL COMPACT><DD> (Nautical.) <DD><B> 1. </B>a stay, usually of wire, between the head of a topmast and the head of the lower section of the next mast toward the stern. <DD><B> 2. </B>either of two ropes or cables, one attached to the head of the foremast and the other to the head of the mainmast, joined by a shackle and used in hoisting cargo from a hold. </DL>
<A NAME="triatomic">
<B>triatomic, </B>adjective.<DL COMPACT><DD> (Chemistry.) <DD><B> 1. </B>containing three atoms; consisting of molecules each containing three atoms. <DD><B> 2. </B>having three atoms or groups which can be replaced. <DD><B> 3. </B><B>=trivalent.</B> </DL>
<A NAME="triaxial">
<B>triaxial, </B>adjective.<DL COMPACT><DD> having three axes. </DL>
<B>triazine, </B>noun.<DL COMPACT><DD><B> 1. </B>one of three isomeric compounds, each having a ring of three carbon atoms and three nitrogen atoms. <DD><B> 2. </B>any one of various substances derived from these compounds. Some are used as pesticides and herbicides. </DL>
<B>triazole, </B>noun.<DL COMPACT><DD> one of a group of four compounds, each having a ring of two carbon atoms and three nitrogen atoms. Triazoles are considered as pyrrole derivatives formed by the substitution of two nitrogen atoms for -CH groups. </DL>
<A NAME="trib">
<B>trib.,</B><DL COMPACT><DD> tributary. </DL>
<A NAME="tribade">
<B>tribade, </B>noun.<DL COMPACT><DD> a woman who is homosexual; Lesbian. </DL>
<A NAME="tribal">
<B>tribal, </B>adjective.<DL COMPACT><DD><B> 1. </B>of a tribe. <BR> <I>Ex. tribal customs.</I> <DD><B> 2. </B>characteristic of a tribe. adv. <B>tribally.</B> </DL>
<A NAME="tribalism">
<B>tribalism, </B>noun.<DL COMPACT><DD><B> 1. </B>the condition of existing in separate tribes. <BR> <I>Ex. Toure tackled the tribalism that plagues all of Africa (Time).</I> <DD><B> 2. </B>tribal relation, feeling, or loyalty. </DL>
<A NAME="tribalist">
<B>tribalist, </B>noun.<DL COMPACT><DD> a person who favors or supports tribalism. </DL>
<A NAME="tribalistic">
<B>tribalistic, </B>adjective.<DL COMPACT><DD> of or having to do with tribalism or tribalists. </DL>
<A NAME="tribalize">
<B>tribalize, </B>transitive verb, <B>-ized,</B> <B>-izing.</B><DL COMPACT><DD> to make or divide into tribes; give a tribal character to. </DL>
<A NAME="tribasic">
<B>tribasic, </B>adjective.<DL COMPACT><DD> (Chemistry.) <DD><B> 1. </B>(of an acid) having three hydrogen atoms which can be replaced by basic atoms or radicals. <DD><B> 2. </B>having three atoms or radicals of a univalent metal. <DD><B> 3. </B>containing three basic hydroxyl (-OH) radicals. </DL>
<A NAME="tribe">
<B>tribe, </B>noun.<DL COMPACT><DD><B> 1. </B>a group of people united by race and customs under the same leaders; ethnic group. <BR> <I>Ex. America was once the home of many Indian tribes.</I> (SYN) clan. <DD><B> 2a. </B>a group of people forming a community and claiming descent from a common ancestor. (SYN) clan. <DD><B> b. </B>any one of the twelve divisions of the ancient Hebrews, each claiming descent from a son of Jacob (in the Bible, Joshua 4:8). <BR> <I>Ex. the tribe of Judah, the ten lost tribes.</I> <DD><B> 3. </B>a class or set of people; fraternity. <BR> <I>Ex. the tribe of artists, the whole tribe of gossips. Society is ... formed of two mighty tribes, the Bores and Bored (Byron).</I> <DD><B> 4. </B>(Biology.) a group of related plants or animals ranking below a family or subfamily and usually containing at least one genus. <DD><B> 5. </B>any group or series of animals or plants. <BR> <I>Ex. The feathered tribe is a name for birds.</I> <DD><B> 6. </B>(Figurative.) a class, kind, group, or sort of things. <DD><B> 7. </B>(in stock breeding) the descendants of a certain female animal through female offspring. <DD><B> 8. </B>in ancient Rome: <DD><B> a. </B>one of the three divisions (Latins, Sabines, and Etruscans) of the Roman people. <DD><B> b. </B>(later) one of the 30 political divisions of the Roman people, increased to 35 in 241 B.C. <DD><B> 9. </B>(in ancient Athens) the largest political subdivision; phyle. </DL>
<A NAME="tribeship">
<B>tribeship, </B>noun.<DL COMPACT><DD><B> 1. </B>the condition of being a tribe. <DD><B> 2. </B>the territory of a tribe. </DL>
<A NAME="tribesman">
<B>tribesman, </B>noun, pl. <B>-men.</B><DL COMPACT><DD> a member of a tribe, especially a man who is a member of a primitive tribe. </DL>
<A NAME="tribespeople">
<B>tribespeople, </B>noun pl.<DL COMPACT><DD> persons constituting a tribe; the members of a tribe. </DL>
<A NAME="tribeswoman">
<B>tribeswoman, </B>noun, pl. <B>-women.</B><DL COMPACT><DD> a woman belonging to a tribe. </DL>
<A NAME="triboelectric">
<B>triboelectric, </B>adjective.<DL COMPACT><DD> of or having to do with triboelectricity. </DL>
<A NAME="triboelectricity">
<B>triboelectricity, </B>noun.<DL COMPACT><DD> electricity produced by friction; static electricity. </DL>
<A NAME="tribological">
<B>tribological, </B>adjective.<DL COMPACT><DD> of or having to do with tribology. adv. <B>tribologically.</B> </DL>
<A NAME="tribology">
<B>tribology, </B>noun.<DL COMPACT><DD> the study of friction, wear, and lubrication. </DL>
<A NAME="triboluminescence">
<B>triboluminescence, </B>noun.<DL COMPACT><DD> the quality of emitting light under friction or violent pressure. </DL>
<A NAME="tribometer">
<B>tribometer, </B>noun.<DL COMPACT><DD> an apparatus for measuring the force of friction in sliding surfaces. </DL>
<A NAME="tribrach">
<B>tribrach, </B>noun.<DL COMPACT><DD> (Greek and Latin Prosody.) a foot of three short or unstressed syllables. </DL>
<A NAME="tribrachic">
<B>tribrachic, </B>adjective.<DL COMPACT><DD><B> 1. </B>consisting of three short or unstressed syllables; constituting a tribrach. <DD><B> 2. </B>having to do with a tribrach or tribrachs. </DL>
<A NAME="tribromoethanol">
<B>tribromoethanol, </B>noun.<DL COMPACT><DD> a crystalline substance, used in solution as an anesthetic; Avertin. </DL>
<A NAME="tribulate">
<B>tribulate, </B>transitive verb, <B>-lated,</B> <B>-lating.</B><DL COMPACT><DD> to trouble greatly; subject to tribulation; afflict. </DL>
<A NAME="tribulation">
<B>tribulation, </B>noun.<DL COMPACT><DD> greattrouble or misery; severe trial; affliction. <BR> <I>Ex. The early Christians suffered many tribulations. The fiery furnace of domestic tribulations (Washington Irving).</I> (SYN) oppression, distress. </DL>
