villanelle (en)

(noun) a chiefly French verse form running on two rhymes and consisting typically of five tercets and a quatrain in which the first and third lines of the opening tercet recur alternately at the end of the other tercets and together as the last two lines of the quatrain / (noun) a 16th century Italian part-song in an intentionally unsophisticated style / (noun) an instrumental piece in the style of a rustic dance