musical (n.)youdaoicibaDictYouDict[musical 词源字典]
"theatrical piece in which music figures prominently," 1937, from musical (adj.) in musical play. Earlier as a noun it meant "musical instrument" (c. 1500), "musical performance" (1570s); "musical party" (1823, a sense now in musicale).[musical etymology, musical origin, 英语词源]