'Roundel' definitions:

Definition of 'roundel'

(from WordNet)
noun
English form of rondeau having three triplets with a refrain after the first and third
noun
Round piece of armor plate that protects the armpit
noun
(heraldry) a charge in the shape of a circle; "a hollow roundel" [syn: annulet, roundel]

Definition of 'Roundel'

From: GCIDE
  • Roundel \Roun"del\, n. [OF. rondel a roundelay, F. rondel, rondeau, a dim. fr. rond; for sense 2, cf. F. rondelle a round, a round shield. See Round, a., and cf. Rondel, Rondelay.]
  • 1. (Mus.) A rondelay. "Sung all the roundel lustily." --Chaucer. [1913 Webster]
  • Come, now a roundel and a fairy song. --Shak. [1913 Webster]
  • 2. Anything having a round form; a round figure; a circle. [1913 Webster]
  • The Spaniards, casting themselves into roundels, . . . made a flying march to Calais. --Bacon. [1913 Webster] Specifically: (a) A small circular shield, sometimes not more than a foot in diameter, used by soldiers in the fourteenth and fifteenth centuries. (b) (Her.) A circular spot; a sharge in the form of a small circle. (c) (Fort.) A bastion of a circular form. [1913 Webster]

Synonyms of 'roundel'

From: Moby Thesaurus