verb (used with object), photosensitized, photosensitizing.
to make (a material) photosensitive, as by the application of a photosensitive emulsion.
Also, especially British, photosensitise.

1920–25; photosensit(ive) + -ize

photosensitization, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To photosensitization
World English Dictionary
photosensitize or photosensitise (ˌfəʊtəʊˈsɛnsɪˌtaɪz)
(tr) to make (an organism or substance) photosensitive
photosensitise or photosensitise
photosensitization or photosensitise
photosensitisation or photosensitise

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

photosensitization pho·to·sen·si·ti·za·tion (fō'tō-sěn'sĭ-tĭ-zā'shən)
The act or process of inducing photosensitivity.

photosensitize pho·to·sen·si·tize (fō'tō-sěn'sĭ-tīz')
v. pho·to·sen·si·tized, pho·to·sen·si·tiz·ing, pho·to·sen·si·tiz·es
To make an organism, a cell, or a substance photosensitive.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Encyclopedia Britannica


the process of initiating a reaction through the use of a substance capable of absorbing light and transferring the energy to the desired reactants. The technique is commonly employed in photochemical work, particularly for reactions requiring light sources of certain wavelengths that are not readily available. A commonly used sensitizer is mercury, which absorbs radiation at 1849 and 2537 angstroms; these are the wavelengths of light produced in high-intensity mercury lamps. Also used as sensitizers are cadmium; some of the noble gases, particularly xenon; zinc; benzophenone; and a large number of organic dyes.

Learn more about photosensitization with a free trial on

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature