PHOTOPERIOD


Meaning of PHOTOPERIOD in English

[pho.to.pe.ri.od] n (1920): a recurring cycle of light and dark periods of constant length; also: photophase

2. -- pho.to.pe.ri.od.ic adj -- pho.to.pe.ri.od.i.cal.ly adv

Merriam-Webster English vocab.      Английский словарь Merriam Webster.