Ron*deau" (?), n. [F. See Roundel.] [Written also rondo.]
A species of lyric poetry so composed as to contain a refrain or repetition which recurs according to a fixed law, and a limited number of rhymes recurring also by rule.
⇒ When the rondeau was called the rondel it was mostly written in fourteen octosyllabic lines of two rhymes, as in the rondels of Charles d'Orleans. . . . In the 17th century the approved form of the rondeau was a structure of thirteen verses with a refrain.
© Webster 1913.