|See also photoperiodism the period of daylight in every 24 hours, esp in relation to its effects on plants and animals|
|a fool or simpleton; ninny.|
|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
photoperiod pho·to·pe·ri·od (fō'tō-pĭr'ē-əd)
The duration of an organism's daily exposure to light, considered especially with regard to the effect of such exposure on growth and development.
|photoperiod (fō'tō-pîr'ē-əd) Pronunciation Key
The duration of an organism's daily exposure to light, considered especially with regard to the phenomena of photoperiodism.