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photoreaction

[foh-toh-ree-ak-shuh n] /ˌfoʊ toʊ riˈæk ʃən/
noun, Chemistry
1.
a chemical reaction that involves or requires light.
Origin
1905-1910
1905-10; photo- + reaction
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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photo-reaction in Medicine

photoreaction pho·to·re·ac·tion (fō'tō-rē-āk'shən)
n.
A photochemical reaction.

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