From Longman Dictionary of Contemporary Englishoctetoc‧tet /ɒkˈtet $ ɑːk-/ noun [countable] 1 APMeight singers or musicians performing together2 APMa piece of music for an octet
Examples from the Corpus
octet• The band began as an octet, but spent most of the set in various sub-divisions, from quartet through to septet.• An octet from Howard was invited to sing for some religious programmes.Origin octet (1800-1900) Latin octo “eight” + English -et (as in duet) 