photoperiodism

noun pho·to·pe·ri·od·ism \ ˌfō-tō-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

in the meaning defined above

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Medical Dictionary

photoperiodism

noun pho·to·pe·ri·od·ism \ -ˈpir-ē-ə-ˌdiz-əm \
variants: also photoperiodicity play \-ˌpir-ē-ə-ˈdis-ət-ē\

medical Definition of photoperiodism

plural photoperiodisms also -ties
: the response or the capacity to respond to photoperiod

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