Meaning of TERNARY in English

TERNARY

adj.1 composed of three parts.

2 Math. using three as a base (ternary scale).

Phrases and idioms:

ternary form Mus. the form of a movement in which the first subject is repeated after an interposed second subject in a related key.

Etymology: ME f. L ternarius f. terni three each

Oxford English vocab.      Оксфордский английский словарь.