Word Study
nonet
CIDE DICTIONARY
nonet, n. [From L. nonus ninth, like E. duet, fr. L. duo.].
A composition for nine instruments, rarely for nine voices. [1913 Webster]
OXFORD DICTIONARY
nonet, n.
1 Mus. a a composition for nine voices or instruments. b the performers of such a piece.
2 a group of nine.
1 Mus. a a composition for nine voices or instruments. b the performers of such a piece.
2 a group of nine.
Etymology
It. nonetto f. nono ninth f. L nonus
For further exploring for "nonet" in Webster Dictionary Online