pho·to·pe·ri·od (f  t-pîr  - d)n. The duration of an organism's daily exposure to light, considered especially with regard to the effect of the exposure on growth and development. pho to·peri·odic (- d k), photo·peri·odi·cal (--kl) adj. |
photoperiod [ˌfəʊtəʊˈpɪərɪəd]
n
(Life Sciences & Allied Applications / Botany) the period of daylight in every 24 hours, esp in relation to its effects on plants and animals See also photoperiodism
photoperiodic adj
photoperiodically adv
| photoperiod (ft-pîr-d) The duration of an organism's daily exposure to light, considered especially with regard to the phenomena of photoperiodism. |
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