"trios" in the noun sense
1. three, 3, III, trio, threesome, tierce, leash, troika, triad, trine, trinity, ternary, ternion, triplet, tercet, terzetto, trey, deuce-ace
the cardinal number that is the sum of one and one and one
a musical composition for three performers
three performers or singers who perform together
4. trio, triad, triplet, triple
a set of three similar things considered as a unit
5. trio, threesome, triad, trinity
three people considered as a unit
Source: WordNet® (An amazing lexical database of English)
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