A flat triangular piece of plastic or other material, having corners of precise angles, used in technical drawing
A right angle tool used to determine if two surfaces join at a 90-degree angle, composed of two arms, usually made from metal.
A triangle.
A trine; an aspect of two planets distant 120 degrees from each other.
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.
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.