quintetto
/k(w)ɪnˈtɛtəʊ/Now rare
noun
1A composition for five voices or instruments; = quintet.
2A group of five persons or things, especially an ensemble of five musicians.
Origin
Mid 18th century; earliest use found in Kane O'Hara (d. 1782), playwright. Apparently from Italian quintetto piece of music with five parts, ensemble of five singers from quinto fith part, fifth + -etto, diminutive suffix. Compare French quintetto.