trinary Definition

trine
adj

1. Triple; threefold; in three parts.
2. astrol.
Said of two heavenly bodies with regard to aspect (sense 5): separated by one third of the zodiac, ie 120°, and so thought to be having a favourable influence.

noun

1. astrol.
A trine aspect.
2. A group of three; a triad; something that has three parts to it.

Derivative: trinal
adj

Etymology: 14c: from Latin trinus threefold.