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