photoperiodism

noun

pho·​to·​pe·​ri·​od·​ism ˌfō-tō-ˈpir-ē-ə-ˌdi-zəm How to pronounce photoperiodism (audio)
: a plant's or animal's response or capacity to respond to photoperiod

Examples of photoperiodism in a Sentence

Recent Examples on the Web
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
The process is called photoperiodism. Eric Betz, Discover Magazine, 19 Dec. 2017

Word History

First Known Use

circa 1911, in the meaning defined above

Time Traveler
The first known use of photoperiodism was circa 1911

Dictionary Entries Near photoperiodism

Cite this Entry

“Photoperiodism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/photoperiodism. Accessed 8 Nov. 2024.

Medical Definition

photoperiodism

noun
pho·​to·​pe·​ri·​od·​ism -ˈpir-ē-ə-ˌdiz-əm How to pronounce photoperiodism (audio)
variants also photoperiodicity
plural photoperiodisms also photoperiodities
: the response or the capacity to respond to photoperiod

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