TERZETTO
three, III, trio, threesome, tierce, leash, troika, triad, trine, trinity, ternary, ternion, triplet, tercet, terzetto, trey, deuce-ace
(noun) the cardinal number that is the sum of one and one and one
Source: WordNet® 3.1
Etymology
Noun
terzetto (plural terzettos)
(music) A composition in three voice parts.
(music) A vocal (or, rarely, instrumental) trio.
Synonyms
• terzet
Source: Wiktionary
Ter*zet"to, n. Etym: [It., dim. of terzo the third, L. tertius. See
Tierce.] (Mus.)
Definition: A composition in three voice parts; a vocal (rarely an
instrumental) trio.
Source: Webster’s Unabridged Dictionary 1913 Edition