photoperiodism Hear it!

photoperiodism definition

photo·peri·od·ism (fōt′ō pir′ē əd iz′əm)

noun

Biol. the behavioral or physiological reaction of an organism to variations in the duration of light, as, in plants, by flowering or ceasing to flower, or, in certain animals, by changing the daily cycle of activities
also photoperiodicity pho′to·pe′rio·dic′·ity (-ə dis′ə tē)

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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effect of photoperodism was first studied in 1920 by garmer and allard

Posted by itrat 105 days ago.

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