(1):

(n.) A kind of game at ball played by three persons standing at the angular points of a triangle.

(2):

(n.) A kind of triangular lyre or harp.

(3):

(n.) The cutting region of the crown of an upper molar, usually the anterior part. That of a lower molar is the Tri"go*nid (/).

(4):

(n.) Trine, an aspect of two planets distant 120 degrees from each other.

(5):

(n.) A division consisting of three signs.

(6):

(n.) A figure having three angles; a triangle.