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.
© Webster 1913
Tri"gon (?), n. (Zoöl.)
The cutting region of the crown of an upper molar, usually the anterior part. That of a lower molar is the Tri"go*nid (&?;).
© Webster 1913