rondel

noun

1. 1.A metric form of verse using two rhymes, usually fourteen 8- to 10-syllable lines in three stanzas, with the first lines of the first stanza returning as refrain of the next two.
2. 2.The verse form rondeau.
3. 3.A rondelle, (small) circular object.
4. 4.A long thin medieval dagger with a circular guard and a circular pommel (hence the name).
5. 5.A small round tower erected at the foot of a bastion.