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photocatalyst in Medicine

photocatalyst

(fō′tō-kătl-ĭst)
n.
  1. A substance that helps bring about a light-catalyzed reaction, such as chlorophyll in photosynthesis.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.