The Probert Encyclopaedia of Heraldry

BADGE

In heraldry, a badge, or cognisance is a distinctive mark somewhat similar to a crest, though not placed on a wreath, nor worn on the helmet. They were rather supplemental bearings quite independent of the charge of the original arms, and were borne on the banners, ensigns, caparisons, and even on the breasts, and more frequently on the sleeves of servants and followers.
Research Badge