Tri″gon (?), n. [L. trigonum, Gr. �; � (see Tri-) + � a corner, angle: cf. F. trigone.]
1. A figure having three angles; a triangle.
2. (Astrol.) (a) A division consisting of three signs. (b) Trine, an aspect of two planets distant 120 degrees from each other. Hutton.
3. (Gr. & Rom. Antiq.) (a) A kind of triangular lyre or harp. (b) A kind of game at ball played by three persons standing at the angular points of a triangle.