A triangle.
An ancient triangular harp of Oriental origin which had four strings and was often used for banquet music. Also called sabbeka, sackbut, sambuca.
A division consisting of three signs.
A trine; an aspect of two planets distant 120 degrees from each other.
An old ball game played by three people standing in a triangular formation.
The cutting region of the crown of an upper molar, usually the anterior part.