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ing which instruction is regularly given to students; as, the school year is divided into three terms.

Threefold; triple; consisting of three; ternate. Tern flowers (Bot.), flowers growing three and three together. -- Tern leaves (Bot.), leaves arranged in threes, or three by three, or having three in each whorl or set. -- Tern peduncles (Bot.), three peduncles growing together from the same axis. -- Tern schooner (N…

Proceeding by threes; consisting of three; as, the ternary number was anciently esteemed a symbol of perfection, and held in great veneration.

Having the parts arranged by threes; as, ternate branches, leaves, or flowers. -- Ter"nate*ly, adv.

Thin iron sheets coated with an alloy of lead and tin; -- so called because made up of three metals.

The number three; three things together; a ternary. Bp. Hall.

Possessing some quality in the third degree; having been subjected to the substitution of three atoms or radicals; as, a tertiary alcohol, amine, or salt. Cf. Primary, and Secondary. (CH3)3C.OH.

A composition in three voice parts; a vocal (rarely an instrumental) trio.

A group or series of four dramatic pieces, three tragedies and one satyric, or comic, piece (or sometimes four tragedies), represented consequently on the Attic stage at the Dionysiac festival.

roups replaced by nitrogen atoms; also, any of various derivatives of the same. There are three isomeric varieties.

ne acid substance, CH2N4, which may be regarded as pyrrol in which nitrogen atoms replace three CH groups; also, any of various derivatives of the same.

A German silver coin worth about three shillings sterling, or about 73 cents.

One of the three Graces.

A ewe lamb of the first year; also, a sheep three years old. [Written also thave.] [Prov. Eng.] Halliwell.

as, ten men, or thereabouts. Five or six thousand horse . . . or thereabouts. Shak. Some three months since, or thereabout. Suckling.

at depth, or to a greater depth than usual; as, land covered thick with manure. Thick and threefold, in quick succession, or in great numbers. [Obs.] L'Estrange.

A sleight-of-hand trick played with three small cups, shaped like thimbles, and a small ball or little pea.

Any one of three possible metameric substances, which are dimethyl derivatives of thiophene, like the xylenes from benzene.

Next after the second; coming after two others; -- the ordinal of three; as, the thirdhour in the day. "The third night." Chaucer.

One more than twelve; ten and three; as, thirteen ounces or pounds.