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Medical Definition of Defense reflex
1. Automatic reactions of an animal, e.g., raising of hair or feathers, dilation of the pupils, or baring of claws, when alarmed. (05 Mar 2000)
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1. Automatic reactions of an animal, e.g., raising of hair or feathers, dilation of the pupils, or baring of claws, when alarmed. (05 Mar 2000)