Photoreaction
[foh-toh-ree-ak-shuh n] /ˌfoʊ toʊ riˈæk ʃən/
noun, Chemistry.
1.
a chemical that involves or requires light.
photoreaction pho·to·re·ac·tion (fō’tō-rē-āk’shən)
n.
A photochemical reaction.
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