Triptote, trip′tōt, n. a noun used in three cases only. [Fr.,—Gr. triptōton—treis, three, ptōtos, falling,—piptein, to fall.]
Triptych, trip′tik, n. a set of tablets consisting of three leaves, each painted with a distinct subject, but joined together by hinges, and capable of being folded so as to present a new face. [Gr. tri, thrice, ptyx, ptychos, a fold, a leaf—ptyssein, to fold.]
Tripudium, trī-pū′di-um, n. among the Romans, a religious dance, also a mode of divination based on observation of the action of birds feeding.—adj. Tripū′diary.—n. Tripudiā′tion, dancing. [L., prob. from tres, three, pes, pedis, foot.]
Triquetrous, trī-kwet′rus, adj. three-sided: triangular—also Triquet′ral.—n. Triquet′ra, an ornament consisting of three interlaced arcs, common in early art in northern Europe.—adv. Triquet′rously.—n. Triquet′rum, one of the triangular Wormian bones in the lambdoid suture of the skull. [L. tres, three, -quetrus, prob. a mere formative.]
Triradiate, trī-rā′di-āt, adj. radiating in three directions.—adv. Trirā′dially.
Trireme, trī′rēm, n. an ancient galley—esp. a war-galley—having three banks or rows of oars. [Fr.,—L. triremis—tri, tres, three, remus, an oar.]
Trisagion, tri-sā′gi-on, n. a hymn used in the early and Oriental Churches, and in the Greek Church, consisting of the words 'O Holy God, holy and mighty, holy and immortal, have mercy on us.' The name is often applied erroneously to the Tersanctus. [Gr. tris, thrice, hagios, holy.]
Trisect, trī-sekt′, v.t. to cut or divide into three equal parts.—n. Trisec′tion, the division of anything, as an angle, into three equal parts. [L. tri, thrice, secāre, sectum, to cut.]
Triseme, trī′sēm, adj. and n. consisting of three semeia, equal to three short syllables, as the tribrach, iambic, and trochee.—Also Trisē′mic. [Gr. treis, three, sēma, a sign.]
Trisepalous, trī-sep′al-us, adj. (bot.) having three sepals.