Early 18th century (in an earlier sense). From Italian musico musician, castrato from classical Latin mūsicus musician, use as noun of mūsicus musical.
Definition of musico in US English:
musico
nounˈmjuːzɪkəʊ
historical, archaic
Specifically. A castrato.
Origin
Early 18th century (in an earlier sense). From Italian musico musician, castrato from classical Latin mūsicus musician, use as noun of mūsicus musical.