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photoperiod
[ foh-tuh-peer-ee-uhd ]
photoperiod
/ ˌfəʊtəʊˈpɪərɪəd /
noun
- the period of daylight in every 24 hours, esp in relation to its effects on plants and animals See also photoperiodism
photoperiod
/ fō′tō-pîr′ē-əd /
- The duration of an organism's daily exposure to light, considered especially with regard to the phenomena of photoperiodism.
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Derived Forms
- ˌphotoˌperiˈodically, adverb
- ˌphotoˌperiˈodic, adjective
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Other Words From
- pho·to·pe·ri·od·ic [foh-t, uh, -peer-ee-, od, -ik], photo·peri·odi·cal adjective
- photo·peri·odi·cal·ly adverb
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Word History and Origins
Origin of photoperiod1
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Example Sentences
Broad limits to functional reproductive activity seem to be set by the photoperiod—neuroendocrine system.
From Project Gutenberg
These captives had been kept for several months at a temperature of 21 degrees Centigrade, and on a daily photoperiod of 15 hours.
From Project Gutenberg
The mice were kept in a room in which temperature and photoperiod were controlled.
From Project Gutenberg
In general, Tb's showed a marked circadian cycle in phase with photoperiod.
From Project Gutenberg
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