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Pronunciation: mor'dant


  1. A substance capable of combining with a dye and the material to be dyed, thereby increasing the affinity or binding of the dye; alum, a mordant commonly used to promote staining with hematoxylin.
  2. To treat with a mordant.

[L. mordeo, to bite]

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