po·lyph·o·ny
noun/pəˈlɪfəni/
/pəˈlɪfəni/
[uncountable] (music)- the combination of several different patterns of musical notes sung together to form a single piece of music
复调 Word Originearly 19th cent.: from Greek poluphōnia, from polu- ‘many’ + phōnē ‘sound’.