photoreaction

[foh-toh-ree-ak-shuh n]

noun Chemistry.

a chemical reaction that involves or requires light.

Origin of photoreaction

First recorded in 1905–10; photo- + reaction
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

photoreaction in Medicine

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.