Trigla, trig′la, n. the typical genus of Triglidæ, the gurnards.—adj. Trig′loid.
Triglot, trī′glot, adj. containing three languages. [Gr. treis, three, glōssa, glōtta, tongue.]
Triglyph, trī′glif, n. a three-grooved tablet at equal distances along the frieze in Doric architecture.—adjs. Triglyph′ic, -al, consisting of, or pertaining to, triglyphs: containing three sets of characters or sculptures. [L. triglyphus—Gr. triglyphos—treis, three, glyphein, to carve.]
Trigon, trī′gon, n. a three-cornered figure, a triangle—also Trigō′non: (astrol.) the junction of three signs, the zodiac being divided into four trigons—the first or watery trigon, Cancer, Scorpio, Pisces; the earthly, Taurus, Virgo, Capricornus; the airy, Gemini, Libra, Aquarius; the fiery, Aries, Leo, Sagittarius.—adjs. Trig′onal, triangular in cross-section: three-angled, esp. in botany; Trigon′ic, pertaining to a trigon; Trig′onous, three-angled. [Gr. trigōnon—tri, tris, thrice, gōnia, an angle.]
Trigoneutic, trī-gō-nū′tik, adj. producing three broods in a year, of insects.—n. Trigoneu′tism. [Gr. treis, three, goneuein, to beget.]
Trigonocerous, trig-ō-nos′e-rus, adj. having horns with three angles.
Trigonometry, trig-ō-nom′e-tri, n. the branch of mathematics which treats of the relations between the sides and angles of triangles.—n. Trigonom′eter, an instrument for solving plane right-angled figures by inspection.—adjs. Trigonomet′ric, -al, pertaining to trigonometry: done by the rules of trigonometry.—adv. Trigonomet′rically.—Trigonometrical survey, the survey of a country by triangulation and trigonometrical calculation upon a single base. [Gr. trigōnon, a triangle, metron, a measure.]
Trigram, trī′gram, n. same as Trigraph.—adjs. Trigrammat′ic, Trigram′mic. [Gr. tri, tris, thrice, gramma, a letter.]
Trigraph, trī′graf, n. a combination of three letters sounded as one, a triphthong. [Gr. tri, tris, thrice, and graphē, a writing—graphein, to write.]