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To cut or divide into three parts.

Divided into three parts or segments by incisions extending to the midrib or to the base; -- said of leaves.

The division of a thing into three parts, Specifically: (Geom.) the division of an angle into three equal parts.

Having three sepals, or calyx leaves.

Arranged in three vertical or spiral rows.

A figure composed of three branches, usually curved, radiating from a center, as the figure composed of three human legs, with bent knees, which has long been used as a badge or symbol of Sicily and of the Isle of Man.

A nitrate formed from three molecules of nitric acid; also, less properly, applied to certain basic nitrates; as, trisnitrate of bismuth.

A solid of the isometric system bounded by twenty-four equal faces, three corresponding to each face of an octahedron. Tetragonal trisoctahedron, a trisoctahedron each face of which is a quadrilateral; called also trapezohedron and icositetrahedron. -- Trigonal trisoctahedron, a trisoctahedron each face of which is an…

A machine with three pulleys which act together for raising great weights. Brande & C.

Containing three seeds; three-seeded; as, a trispermous capsule.

Of or pertaining to the three great splanchnic cavities, namely, that of the head, the chest, and the abdomen; -- applied to the sympathetic nervous system.

Arranged in three vertical rows.

Having, or consisting of, three stigmas. Gray.

Something having three forks or prongs, as a trident. [Obs.] "Jupiter's trisulc." Sir T. Browne.

Having three furrows, forks, or prongs; having three grooves or sulci; three-grooved.

A sulphide containing three atoms of sulphur.

Of or pertaining to a trisyllable; consisting of three syllables; as, "syllable" is a trisyllabic word. -- Tris`yllab"ic*al*ly, adv.

A word consisting of three syllables only; as, a-ven-ger.

Three times ternate; -- applied to a leaf whose petiole separates into three branches, each of which divides into three parts which each bear three leafiets.

The opinion or doctrine that the Father, Son, and Holy Spirit are three distinct Gods.