| NOUN | process | photochemical reaction | a chemical reaction produced by the action of light |
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| Meaning | A chemical reaction produced by the action of light. | |
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| Narrower | light reaction | The first stage / stage of photosynthesis during which energy from light is used for the production of ATP |
| Broader | chemical reaction, reaction | (chemistry) a process in which one or more substances are changed into others |
| Spanish | reacción fotoquímica | |
| Catalan | reacció fotoquímica | |
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