roundlet

From Middle English roundelet, from Middle French rondelet, a diminutive of rondel (“small circle”).

roundlet (plural roundlets)

1. A small disk, circle or other round object.
   • 1653, Sir Hugh Plat, The Jewel House of Art and Nature:

     […] let the water continue on the fire a Pater noster while, then take it off, and being cold, put the ſame into ſome roundlet, filling the roundlet brim full.

   • 1894, Sir Francis James Grant, The Manual of Heraldry, page 37:

     The annexed arrangements of roundlets in shields will show how they are placed and described.

   • 2011, Dorothy Hartley, Medieval Costume and How to Recreate It, page 91:

     The basis of the chaperon was a wreath-like pad, called a bourlet or roundlet (not unlike a miniature motor-tyre), encircling the temples.

• rondel

• rondeau
• rondelet
• roundelay