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Definition of: photoperiodism

(fō′tō·pirē·ə·diz·əm) noun
The response of an organism to variations in the duration of day and night or other cyclic illumination. Also pho·to·pe·ri·od·i·ci·ty (pir′ē·ə·disə·tē).

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Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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