photopathy

photopathy

[foh-top-uh-thee]
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.

Origin:
1895–1900; photo- + -pathy

photopathic [foh-tuh-path-ik] , adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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