Main Entry: pho·to·pe·ri·od·ism

Pronunciation: \-ˈpir-ē-ə-ˌdiz-əm\

Variant(s): also pho·to·pe·ri·od·ic·i·ty \-ˌpir-ē-ə-ˈdis-ət-ē\

Function: noun

Inflected Form(s): plural pho·to·pe·ri·od·isms also pho·to·pe·ri·od·ic·i·ties

: the response or the capacity to respond to photoperiod