Rondel
Pronunciation : Ron"del
Part of Speech : n.
Etymology : [Cf. Rondeau, Roundel.]
Definition : 1. (Fort.)
Defn: A small round tower erected at the foot of a bastion. [Obs.]
2. Etym: [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.
Source : Webster's Unabridged Dictionary, 1913