[ Gr. tri- or L. tri-, sometimes through French; akin to L. tres three, and E. three. See Three. ] [ 1913 Webster ]

1. A prefix meaning three, thrice, threefold; as in tricolored, tridentate. [ 1913 Webster ]

2. (Chem.) A prefix (also used adjectively) denoting three proportional or combining part, or the third degree of that to the name of which it is prefixed; as in trisulphide, trioxide, trichloride. [ 1913 Webster ]

a. [ From Try. ] 1. Fit or possible to be tried; liable to be subjected to trial or test. “Experiments triable.” Boyle. [ 1913 Webster ]

2. (Law) Liable to undergo a judicial examination; properly coming under the cognizance of a court; as, a cause may be triable before one court which is not triable in another. [ 1913 Webster ]

n. Quality or state of being triable. [ 1913 Webster ]

a. [ Pref. tri- + acid. ] (Chem.) Capable of neutralizing three molecules of a monobasic acid or the equivalent; having three hydrogen atoms which may be acid radicals; -- said of certain bases; thus, glycerin is a triacid base. [ 1913 Webster ]

n. See Treacle. [ Obs. ] Chaucer. [ 1913 Webster ]

a. [ Gr. &unr_; thirty + &unr_; seat, base. ] Having thirty sides. [ 1913 Webster ]

n. [ Gr. &unr_;, fr. &unr_; thirty. ] (Gr. Antiq.) A vessel with thirty banks of oars, or, as some say, thirty ranks of rowers. [ 1913 Webster ]

n. [ L. trias, -adis, Gr. &unr_;, &unr_;, fr.&unr_;, &unr_;, three: cf. F. triade. See Three, and cf. Trias, Trio. ] 1. A union of three; three objects treated as one; a ternary; a trinity; as, a triad of deities. [ 1913 Webster ]

2. (Mus.) (a) A chord of three notes. (b) The common chord, consisting of a tone with its third and fifth, with or without the octave. [ 1913 Webster ]

3. (Chem.) An element or radical whose valence is three. [ 1913 Webster ]

Triads of the Welsh bards, poetical histories, in which the facts recorded are grouped by threes, three things or circumstances of a kind being mentioned together. --
Hindu triad. See Trimurti. [ 1913 Webster ]

a. [ Pref. tri- + Gr. &unr_; brother. ] (Bot.) Having stamens joined by filaments into three bundles. See Illust. under Adelphous. [ 1913 Webster ]

a. (Chem.) Having the characteristics of a triad; as, boron is triadic. [ 1913 Webster ]