from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The reaction resulting from the recognition and binding of an antigen by its specific antibody or by a previously sensitized lymphocyte.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun All the changes in a
tissuethat result from the action of a foreign substanceintroduced into an organism
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a bodily defense reaction that recognizes an invading substance (an antigen: such as a virus or fungus or bacteria or transplanted organ) and produces antibodies specific against that antigen
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