annulet > define

noun

• Heraldry) a charge in the shape of a circle. (
  • usage: "a hollow roundel"
  • synonyms: roundel
• Molding in the form of a ring; at top of a column.
  • synonyms: bandelet, bandelette, bandlet, square and rabbet
• A small ring. .

• (n.) A small, flat fillet, encircling a column, etc., used by itself or with other moldings. It is used, several times repeated, under the Doric capital.
• (n.) A narrow circle of some distinct color on a surface or round an organ.
• (n.) A little ring.
• (n.) A little circle borne as a charge.