allergic reaction
American Heritage Stedman's Medical Dictionary:
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allergic reaction
n.
A local or generalized reaction of an organism to internal or external contact with a specific allergen to which the organism has been previously sensitized.
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American Heritage Stedman's Medical Dictionary
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company.
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