ternion Meaning, Definition & Usage

  1. noun the cardinal number that is the sum of one and one and one
    deuce-ace; trio; triplet; tercet; tierce; troika; three; trey; 3; trine; ternary; triad; threesome; leash; III; trinity; terzetto.

WordNet

Ter"ni*on noun
Etymology
L. ternio, fr. terni three each. See Tern, a.
Definitions
  1. The number three; three things together; a ternary. Bp. Hall.

Webster 1913