ternion

[ tur-nee-uh n ]
/ ˈtɜr ni ən /

noun

a set or group of three; triad.

Origin of ternion

1580–90; < Latin terniōn- (stem of terniō) triad. See tern2, -ion

British Dictionary definitions for ternion

ternion
/ (ˈtɜːnɪən) /

noun

rare a group of three

Word Origin for ternion

C16: from Latin terniō triad, from ternī three each; related to ter thrice