Roundel /(?)/

Roun·del

Roundel

n.
  1. A rondelay. (Mus.)
    Come, now a roundel and a fairy song.
  2. Anything having a round form; a round figure; a circle.
    The Spaniards, casting themselves into roundels, . . . made a flying march to Calais.
  3. A small circular shield, sometimes not more than a foot in diameter, used by soldiers in the fourteenth and fifteenth centuries. (Her.)