What is the broad flattened part of an antler, as of a full-grown fallow deer; -- so called as resembling the palm of the hand with its protruding fingers called?

palm — (Zoöl.) The broad flattened part of an antler, as of a full-grown fallow deer; -- so called as resembling the palm of the hand with its protruding fingers. (Webster's 1913.)

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