a heavily syncopated dance music that originated among the blacks of S Louisiana, containing elements of blues, traditional white Cajun music, etc. and played usually by a band that includes accordion, guitar, and washboard
See zydeco in American Heritage Dictionary 4
(zīˈdĭ-kōˌ)
noun
Popular music of southern Louisiana that combines French dance melodies, elements of Caribbean music, and the blues, played by small groups featuring the guitar, the accordion, and a washboard.