quintet (n.)youdaoicibaDictYouDict[quintet 词源字典]
1811, "composition for five voices," from Italian quintetto, diminutive of quinto "fifth," from Latin quintus "the fifth," related to quinque "five" (see quinque-). Meaning "set of five singers or players" is from 1882.[quintet etymology, quintet origin, 英语词源]