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allergic reaction

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allergic reaction

noun
hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity [syn: allergy
WordNet® 3.0, © 2006 by Princeton University.
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Medical Dictionary

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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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