The roundel is a generic name which comprises all charges which are plain circular figures of color or metal. There are different terms for each color in English heraldry as shown below. Roundels of more than one color are refered to as "per pale".

or = bezant	argent = plate	gules = torteau	azure = hurt	sable = ogress, pellet or gunstone
vert = pomme or pomeis	purpure = golpe	tenné = orange	sanguine = guze	barry wavy argent & azure = fountain