trigon

/T R IH1 G AH0 N/
noun
  1. 1

    A triangle.

  2. 2

    An ancient triangular harp of Oriental origin which had four strings and was often used for banquet music. Also called sabbeka, sackbut, sambuca.

  3. 3

    A division consisting of three signs.

  4. 4

    A trine; an aspect of two planets distant 120 degrees from each other.

  5. 5

    An old ball game played by three people standing in a triangular formation.

  6. 6

    The cutting region of the crown of an upper molar, usually the anterior part.

Source: https://en.wiktionary.org/wiki/trigon