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Webster's New World College Dictionary » photoperiod
photoperiod
photoperiod definition
photo·peri·od (fōt′ō pir′ē əd)
noun
the number of daylight hours best suited to the growth and maturation of an organism
Related Forms:
- photoperiodic pho′to·pe′ri·od′ic (-pir′ē äd′ik) adjective
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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