'Terzetto' definitions:

Definition of 'terzetto'

From: WordNet
noun
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, ternion, triplet, tercet, terzetto, trey, deuce- ace]

Definition of 'Terzetto'

From: GCIDE
  • Terzetto \Ter*zet"to\, n. [It., dim. of terzo the third, L. tertius. See Tierce.] (Mus.) A composition in three voice parts; a vocal (rarely an instrumental) trio. [1913 Webster] Tesla coil