photoperiodism


pho·to·pe·ri·od·ism

noun \-ˈpir-ē-ə-ˌdi-zəm\

Definition of PHOTOPERIODISM

:  a plant's or animal's response or capacity to respond to photoperiod

First Known Use of PHOTOPERIODISM

circa 1911

pho·to·pe·ri·od·ism

noun \-ˈpir-ē-ə-ˌdiz-əm\   (Medical Dictionary)
plural pho·to·pe·ri·od·isms also pho·to·pe·ri·od·ic·i·ties

Medical Definition of PHOTOPERIODISM

: the response or the capacity to respond to photoperiod

Variants of PHOTOPERIODISM

pho·to·pe·ri·od·ism also pho·to·pe·ri·od·ic·i·ty \-ˌpir-ē-ə-ˈdis-ət-ē\

photoperiodism

noun    (Concise Encyclopedia)

Response by an animal or plant to changes in daily, seasonal, or yearly cycles of light and darkness. Among animals, sleep, migration, reproduction, and the changing of coats or plumage are regulated to some extent by day length. In the poultry industry, photoperiodism is commonly induced by artificial lighing to maximize egg laying and body weight. Plant growth, seed setting, germination, flowering, and fruiting are also affected by day length. Other environmental factors that modify an organism's responses include temperature and nutrition.

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