Definition of trigons:
(n) :
(countable, astrology) A division consisting of three star signs.
(n) :
(countable, astrology) A trine; an aspect of two planets distant 120 degrees from each other.
(n) :
(countable, zoology) The cusp (cutting region) of the crown of an upper molar, usually the anterior part.
(n) :
(countable, geometry, rare) A triangle.
(n) :
(countable, historical, music) An ancient triangular harp of Oriental origin which had four strings and was often used for banquet music. Also called sabbeka, sackbut, sambuca.
(n) :
(uncountable, historical) An old ball game played by three people standing in a triangular formation. See Wikipedia's entry for the game)