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photoreaction

[ foh-toh-ree-ak-shuhn ]
/ ˌfoʊ toʊ riˈæk ʃən /
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noun Chemistry.

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. 2021

Medical definitions for photoreaction

photoreaction
[ fō′tō-rē-ăkshən ]

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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