\Ron"del\, n. [Cf. {Rondeau}, {Roundel}.]
1. (Fort.) A small round tower erected at the foot of a
   bastion. [Obs.]
2. [F.]
   (a) Same as {Rondeau}.
   (b) Specifically, a particular form of rondeau containing
       fourteen lines in two rhymes, the refrain being a
       repetition of the first and second lines as the
       seventh and eighth, and again as the thirteenth and
       fourteenth. --E. W. Gosse.