triad

trin tern tern

triad n.

三個一組, 三幅一組, [音]三和音

英英解釋:名詞triad:
1. the cardinal number that is the sum of one and one and one
同義詞：three, 3, III, trio, threesome, tierce, leash, troika, trine, trinity, ternary, ternion, triplet, tercet, terzetto, trey, deuce-ace
2. a set of three similar things considered as a unit
同義詞：trio, triplet, triple
3. three people considered as a unit
同義詞：trio, threesome, trinity
4. a three-note major or minor chord; A NOTE and its third and fifth tones
同義詞：common chord