Ter·ni·on n.  The number three; three things together; a ternary.
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  ternion
       n : 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,
            triplet, tercet, terzetto, trey, deuce-ace]