Meaning of TERNARY in English
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. 2012