[ ɒk'tɛt ]
■ noun
1》 a group of eight musicians.
↘a musical composition for eight voices or instruments.
2》 a group of eight lines of verse.
3》 Chemistry a stable group of eight electrons occupying a single shell in an atom.
Origin
C19: from Ital. ottetto or Ger. Oktett , on the pattern of duet and quartet .