Skip to Content
Medical Term:


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]

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