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ternion

[tur-nee-uh n]
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noun
  1. 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. 2018
British Dictionary definitions for ternion

ternion

noun
  1. rare a group of three

Word Origin

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