Trigrammic
(Tri*gram"mic) a. [Gr. . See Trigrammatic.] Same as Trigrammatic.
Trigraph
(Tri"graph) n. [Pref. tri- + - graph.] Three letters united in pronunciation so as to have but
one sound, or to form but one syllable, as -ieu in adieu; a triphthong.
Trigyn
(Tri"gyn) n. (Bot.) Any one of the Trigynia.
Trigynia
(||Tri*gyn"i*a) n. pl. [NL., Gr. (see Tri-) + a woman, a female.] (Bot.) A Linnæan order of plants
having three pistils or styles.
Trigynian
(Tri*gyn"i*an Trig"y*nous) a. (Bot.) Having three pistils or styles; of or pertaining to the Trigynia.
Trihedral
(Tri*he"dral) a. [See Trihedron.] (Geom.) Having three sides or faces; thus, a trihedral angle
is a solid angle bounded by three plane angles. [Written also triedral.]
Trihedron
(Tri*he"dron) n. [Pref. tri- + Gr. a seat, base.] (Geom.) A figure having three sides.
Trihoral
(Tri*ho"ral) a. [Pref. tri- + horal.] Occurring once in every three hours.
Trijugate
(Trij"u*gate) a. [See Trijugous.] (Bot.) In three pairs; as, a trijugate leaf, or a pinnate leaf
with three pairs of leaflets.
Trijugous
(Trij"u*gous) a. [L. trijugus threefold; tri- + jugum a yoke.] (Bot.) Same as Trijugate.
Trikosane
(Tri"ko*sane) n. [Pref. tri- + Gr. twenty.] (Chem.) A hydrocarbon, C23H48, of the methane
series, resembling paraffin; - - so called because it has twenty-three atoms of carbon in the molecule.
Trilateral
(Tri*lat"er*al) a.[L. trilaterus; tri- (see Tri-) + latus, lateris, side: cf. F. trilatéral. See Lateral.]
(Geom.) Having three sides; being three-sided; as, a trilateral triangle. — Tri*lat"er*al*ly, adv. — Tri*lat"er*al*ness,
n.
Trilemma
(Tri*lem"ma) n. [NL., fr. Gr. (see Tri-) + any thing received, in logic, an assumption. Cf.
Dilemma.]
1. (Logic) A syllogism with three conditional propositions, the major premises of which are disjunctively
affirmed in the minor. See Dilemma.
2. A state of things in which it is difficult to determine which one of three courses to pursue.
Trilinear
(Tri*lin"e*ar) a. (Math.) Of, pertaining to, or included by, three lines; as, trilinear coördinates.
Trilingual
(Tri*lin"gual) a. [L. trilinguis; tri- (see Tri-) + lingua tongue, language. See Lingual.] Containing,
or consisting of, three languages; expressed in three languages.
The much-noted Rosetta stone . . . bears upon its surface a trilingual inscription.
I. Taylor. Trilinguar
(Tri*lin"guar) a. See Trilingual.
Triliteral
(Tri*lit"er*al) a. [Pref. tri- + literal.] Consisting of three letters; trigrammic; as, a triliteral root
or word. — n. A triliteral word.
Triliteralism
(Tri*lit"er*al*ism) n. Same as Triliterality.
Triliterality
(Tri*lit`er*al"i*ty Tri*lit"er*al*ness) n. The quality of being triliteral; as, the triliterality of Hebrew
roots. W. D. Whitney.
Trilith
(Tri"lith) n. Same as Trilithon. Mollett.
