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photopathy

American  
[foh-top-uh-thee] / foʊˈtɒp ə θi /

noun

  1. movement of an organism in response to the intensity of light, especially away from the source of light.

  2. any condition or disease produced by the effect of light, especially in excessive amounts.


Other Word Forms

  • photopathic adjective

Etymology

Origin of photopathy

First recorded in 1895–1900; photo- + -pathy