'Ternion' definitions:

Definition of 'ternion'

(from WordNet)
noun
The cardinal number that is the sum of one and one and one [syn: three, 3, III, trio, threesome, tierce, leash, troika, triad, trine, trinity, ternary, ternion, triplet, tercet, terzetto, trey, deuce- ace]

Definition of 'Ternion'

From: GCIDE
  • Ternion \Ter"ni*on\, n. [L. ternio, fr. terni three each. See Tern, a.] The number three; three things together; a ternary. --Bp. Hall. [1913 Webster]