Pronunciation: (hī"pur-sen'si-tīz"), [key]
—v.t., -tized, -tiz•ing.
1. Photog.to treat (a film or emulsion) so as to increase its speed.
2. Pathol.to strongly heighten a reaction upon reexposure to a particular antigen. Also, esp. Brit.,hy"per•sen'si•tise".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.