TRI- 



331 



TRI- 



cusps of upper jaw molar teeth 

 (zool\ 



trigonal (trig'dn&l) a. [Gk. Ma, 

 three ; gonia, angle.] Ternary or 

 triangular when appl. symmetry 

 with three parts to a whorl ; appl. 

 three-sided stems (hot.}. 



trigone (trl'gon) n. [Gk. Ma, three ; 

 gonia, angle.] Also trigonum, a 

 small triangular space, as the ol- 

 factory trigone, the trigonum vesicae 

 (anat.). 



trigonid (trig'onfd) n. [Gk. Ma, 

 three ; gonia, an angle.] The 

 triangle of cusps of lower jaw molar 

 teeth (sool.). 



trigynous (trij'inus) a. [Gk. tria, 

 three ; gyne, woman.] Having 

 three styles (bot.). 



trijugate (trljoog'at) a. [L. tres, 

 three ; jugum, a yoke.] Having 

 three pairs of leaflets (hot.), 



trilabiate (trila'blat) a. [L. tres, 

 three ; labium, lip.] Having three 

 lips (dot.'). 



trilobate (trilo'bat) a. [Gk. Ma, 

 three ; lobos, a lobe.] Three-lobed. 



trilocular (trllok'ular) a. [L. tres, 

 three ; loculus, a little place.] 

 Having three cells or loculi. 



trilophodont (trllof'odont) a. [Gk. 

 Ma, three ; lophos, a crest ; odous, 

 tooth.] Having three-crested teeth 



(wrt). 



trilophous (trilofus) a. [Gk. Ma, 

 three ; lophos, crest.] Appl. a rayed 

 spicule with three rays . branched 

 or ridged (zool.). 



trimerous (trim'e'rus) a. [Gk. Ma, 

 three ; ineros, part.] Composed of 

 multiples of three, as the parts of a 

 flower (bot.). 



trimorphism (trlmor'ftzm) n. [Gk. 

 tria, three ; morphe, form.] Oc- 

 currence of three distinct forms or 

 forms of organs in one species 

 (biol). 



trimorphous (trimor'fus) a. [Gk. Ma, 

 three ; morphe, form.] With three 

 distinct forms or forms of organs 

 occurring in the same species (biol.). 



trinervate (trineVvat) a. [L. tres, 

 three ; nervus, a sinew.] Having 

 three veins or ribs running from 

 base to margin of leaf (bot.). 



trinomial (trmo'mTal) a. [L. tres, 

 three ; nomen, name.] Appl. names 



consisting of three terms ; cf. 

 binomial (biol.). 



trioecious (trie'shCis) a. [Gk. tria, 

 three ; oikos, house.] Producing 

 male, female, and hermaphrodite 

 flowers on different plants (bot.). 



triovulate (triov'ulat) a. [L. tres, 

 three ; ovum, egg.] Having three 

 ovules (bot.}. 



tripartite (tripar'tlt, trip'artlt) a. [L. 

 tres, three ; fiartitus, separated.] 

 Divided into three lobes, as a leaf 

 (bot.\ 



tripetalous (trtpgt'alus) a. [Gk. tria y 

 three ; petalon, a leaf.] Having 

 three petals (bot.). 



tripinnate (trlpin'at) a. [L. tres, 

 three ; pinna, feather.] Thrice 

 pinnate ; divided pinnately three 

 times (bot.). 



tripinnatifld (tripinat'IfTd) a. -[L. 

 tres, three ; pinna, feather ; findere, 

 to cleave.] Divided three times in 

 a pinnatifid manner (bot.). 



tripinnatisect (trlpTnat'isgkt) a. [L. 

 tres, three ; pinna, feather ; secarc, 

 to cut] Thrice pinnatisect ; three 

 times lobed with divisions nearly to 

 midrib (bot.). 



triple-nerved, appl. a leaf with three 

 prominent veins (bot.). 



triplicostate (trip'likos'tat) a. [L. 

 triplex, triple ; costa, a rib.] Having 

 three ribs (bot.). 



triploblastic (trip'loblas'tik) a. [Gk. 

 triplax, triple ; blastos, a bud.] 

 Having three primary germinal 

 layers, epiblast, mesoblast, and 

 hypoblast (etnb.). 



tripod (trl'pod) n. [Gk. tria, three ; 

 pous, foot.] A tripod-shaped or 

 three-legged spicule (zool.). 



tripolar (tnpo'lar.) a. [Gk. Ma, three ; 

 polos, an axis.] Appl. the division 

 of the chromatin to three poles in 

 diseased cells instead of the normal 

 two poles, in mitosis (cyt.). 



triquetrous (trikweVriis) a. [L. tri- 

 quetrus, three-cornered.] Appl. a 

 stem with three angles and three 

 concave faces (bot.) ; appl. a three- 

 cornered or wedge - shaped bone 

 (anat.). 



triquetrum (trlkwgt'rum) n. [L. M- 

 quetrus, three - cornered.] The 

 cuneiform carpal bone (zool.)', a 

 Wormian bone (anat.). 



