Skip to Content


Pronunciation: har'den-ing


  1. A condition of lessened reactions to allergens from repeated or prolonged nontherapeutic exposure, similar to hyposensitization.
  2. Any procedure in tissue preparation for examinations (sectioning for microscopy) that renders the tissue firmer.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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