Dictionary

photoreaction

noun pho·to·re·ac·tion \-rē-ˈak-shən\

Definition of PHOTOREACTION

:  a photochemical reaction

First Known Use of PHOTOREACTION

1909

photoreaction

noun pho·to·re·ac·tion \-rē-ˈak-shən\   (Medical Dictionary)

Medical Definition of PHOTOREACTION

:  a photochemical reaction

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