nonet
/nəʊˈnet/noun
1- a group of nine people or things, especially musicians（尤指音乐家）九人组合; 九件套（物品）。
1.1
- a musical composition for nine voices or instruments九重唱（奏）曲。
词源
mid 19th cent.: from Italian nonetto, from nono 'ninth', from Latin nonus.