Meaning of hypersensitize

hy•per•sen•si•tize

Pronunciation: (hī"pur-sen'si-tīz"), [key]
— -tized, -tiz•ing.
  1. to treat (a film or emulsion) so as to increase its speed.
  2. to strongly heighten a reaction upon reexposure to a particular antigen.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.