What is a figure, sometimes of a man, but commonly of some animal, placed on either side of an escutcheon, and exterior to it. Usually, both supporters of an escutcheon are similar figures called?

supporter — (Her.) A figure, sometimes of a man, but commonly of some animal, placed on either side of an escutcheon, and exterior to it. Usually, both supporters of an escutcheon are similar figures. (Webster's 1913.)

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