roundel

definition: (heraldry) a charge in the shape of a circle
example: a hollow roundel
speech part: noun
synonyms: annulet
definition: round piece of armor plate that protects the armpit
example:
speech part: noun
synonyms:
definition: English form of rondeau having three triplets with a refrain after the first and third
example:
speech part: noun
synonyms:

How roundel is being used?