round·let \ˈrau̇ndlə̇t, rapid -nl-; usu -ə̇d.+V\noun (-s) Etymology: Middle English roundelet, from Middle French rondelet — more at roundelay 1.: a little circle or round object : disk 2.: a 15th century hat for men with a round padded edge and loose drapery forming the crown and hanging over the edge 3.: rundlet 4.heraldry: roundel 3