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photoreaction

[foh-toh-ree-ak-shuh n]
noun Chemistry.
  1. a chemical reaction that involves or requires light.
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Origin of photoreaction

First recorded in 1905–10; photo- + reaction
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

photoreaction in Medicine

photoreaction

(fō′tō-rē-ăkshən)
n.
  1. A photochemical reaction.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.