Roundel
Identification symbol, commonly used in aircraft insignia and heraldry, usually of circular design / From Wikipedia, the free encyclopedia
This article is about the insignia/symbol. For other uses, see Roundel (disambiguation).
A roundel is a circular disc used as a symbol. The term is used in heraldry, but also commonly used to refer to a type of national insignia used on military aircraft, generally circular in shape and usually comprising concentric rings of different colours. Other symbols also often use round shapes.