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photopathy

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

movement of an organism in response to the intensity of light, especially away from the source of light.
any condition or disease produced by the effect of light, especially in excessive amounts.

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On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

Origin of photopathy

First recorded in 1895–1900; photo- + -pathy
pho·to·path·ic [foh-tuh-path-ik], /ˌfoʊ təˈpæθ ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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