photoperiod

(fōtō pir′ē əd)

noun

the number of daylight hours best suited to the growth and maturation of an organism

Related Forms:

See photoperiod in American Heritage Dictionary 4

noun
The duration of an organism's daily exposure to light, considered especially with regard to the effect of the exposure on growth and development.

Related Forms:

  • phoˌto·peˌri·odˈic (-ŏdˈĭk), phoˌto·peˌri·odˈi·cal (-ĭ-kəl) adjective

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