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Definition of "photoperiodism" [photoperiodism]

  • The response of an organism to changes in its photoperiod, especially as indicated by vital processes. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "photoperiodism" in a sentence
  • "An often overlooked indicator is what biologists refer to as photoperiodism, or the amount of light in any given day."
  • "My scientific specialty is chronobiology (circadian rhythms and photoperiodism), with additional interests in comparative physiology, animal behavior and evolution."
  • "A fellow working about circadian rhythms and photoperiodism, posted the abstract of Boyd's Dissertation:"