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Pronunciation: ir'i-ta'shun


  1. Extreme incipient inflammatory reaction of the tissues to an injury.
  2. The normal response of nerve or muscle to a stimulus.
  3. The evocation of a normal or exaggerated reaction in the tissues by the application of a stimulus.

[L. irritatio]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.