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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012