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Related to photochemical reaction: photochemical smog, photochemistry
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|Noun||1.||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"
light reaction - the first stage of photosynthesis during which energy from light is used for the production of ATP