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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

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.