What's the difference between rondel and roundelay?

Rondel

Definition:

• (n.) A small round tower erected at the foot of a bastion.
• (n.) Same as Rondeau.
• (n.) 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.

Example Sentences:

Roundelay

Definition:

• (n.) See Rondeau, and Rondel.
• (n.) A tune in which a simple strain is often repeated; a simple rural strain which is short and lively.
• (n.) A dance in a circle.
• (n.) Anything having a round form; a roundel.

Example Sentences:

• (1) That Chekhovian title may have promised Woody Allen at his most pretentious, but this 1986 roundelay grossed $40m and became his biggest ever box-office hit.