#photochemical_reaction__photochemicalreaction  a chemical reaction produced by the action of light
  supertype:  #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"
  subtype:  #light_reaction__lightreaction  the first stage of photosynthesis during which energy from light is used for the production of ATP

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