photoperiod

noun
pho·​to·​pe·​ri·​od | \ ˌfō-tō-ˈpir-ē-əd How to pronounce photoperiod (audio) \

Definition of photoperiod

: a recurring cycle of light and dark periods of constant length also : photophase sense 2

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Other Words from photoperiod

photoperiodic \ ˌfō-​tō-​ˌpir-​ē-​ˈä-​dik How to pronounce photoperiodic (audio) \ adjective
photoperiodically \ ˌfō-​tō-​ˌpir-​ē-​ˈä-​di-​k(ə-​)lē How to pronounce photoperiodically (audio) \ adverb

Examples of photoperiod in a Sentence

Recent Examples on the Web About 10 varieties are being grown using photoperiod manipulation, which will be featured on the tours. Lauren Delgado, OrlandoSentinel.com, "5 questions about Florida Hops," 9 July 2018 About 10 varieties are being grown using photoperiod manipulation, which will be featured on the tours. Lauren Delgado, OrlandoSentinel.com, "5 questions about Florida Hops," 9 July 2018 About 10 varieties are being grown using photoperiod manipulation, which will be featured on the tours. Lauren Delgado, OrlandoSentinel.com, "5 questions about Florida Hops," 9 July 2018 About 10 varieties are being grown using photoperiod manipulation, which will be featured on the tours. Lauren Delgado, OrlandoSentinel.com, "5 questions about Florida Hops," 9 July 2018 About 10 varieties are being grown using photoperiod manipulation, which will be featured on the tours. Lauren Delgado, OrlandoSentinel.com, "5 questions about Florida Hops," 9 July 2018 About 10 varieties are being grown using photoperiod manipulation, which will be featured on the tours. Lauren Delgado, OrlandoSentinel.com, "5 questions about Florida Hops," 9 July 2018 About 10 varieties are being grown using photoperiod manipulation, which will be featured on the tours. Lauren Delgado, OrlandoSentinel.com, "5 questions about Florida Hops," 9 July 2018 About 10 varieties are being grown using photoperiod manipulation, which will be featured on the tours. Lauren Delgado, OrlandoSentinel.com, "5 questions about Florida Hops," 9 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'photoperiod.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of photoperiod

1920, in the meaning defined above

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Time Traveler for photoperiod

Time Traveler

The first known use of photoperiod was in 1920

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Statistics for photoperiod

Cite this Entry

“Photoperiod.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/photoperiod?pronunciation&lang=en_us&dir=p&file=photop01. Accessed 14 December 2019.

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More Definitions for photoperiod

photoperiod

noun
pho·​to·​pe·​ri·​od | \ ˌfōt-ō-ˈpir-ē-əd How to pronounce photoperiod (audio) \

Medical Definition of photoperiod

: a recurring cycle of light and dark periods of constant length

Other Words from photoperiod

photoperiodic \ -​ˌpir-​ē-​ˈäd-​ik How to pronounce photoperiodic (audio) \ adjective
photoperiodically \ -​i-​k(ə-​)lē How to pronounce photoperiodically (audio) \ adverb

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