Definition of photochemical reaction Photochemical reaction

We found 3 definitions of photochemical reaction from 3 different sources.

What does photochemical reaction mean?

Noun
photochemical reaction - a chemical reaction produced by the action of light
		chemical reaction, reaction (chemistry) a process in which one or more substances are changed into others; "there was a chemical reaction of the lime with the ground water"

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photochemical reaction (Noun)
Any chemical reaction initiated by the absorption of a quantum of electromagnetic radiation to form an excited state .