triad

nouns

the cardinal number that is the sum of one and one and one
3, III, deuce-ace, leash, tercet, ternary, ternion, terzetto, three, threesome, tierce, trey, triad, trine, trinity, trio, triplet, troika
a set of three similar things considered as a unit
triad, trio, triple, triplet
three people considered as a unit
threesome, triad, trinity, trio
a three-note major or minor chord; a note and its third and fifth tones
common chord, triad