photoperiod
[ foh-tuh-peer-ee-uh d ]
/ ˌfoʊ təˈpɪər i əd /
noun Biology.
the interval in a 24-hour period during which a plant or animal is exposed to light.
OTHER WORDS FROM photoperiod
pho·to·pe·ri·od·ic [foh-tuh-peer-ee-od-ik] /ˌfoʊ təˌpɪər iˈɒd ɪk/, pho·to·pe·ri·od·i·cal, adjective pho·to·pe·ri·od·i·cal·ly, adverbWords nearby photoperiod
photonovel,
photonuclear,
photooxidation,
photopathy,
photoperceptive,
photoperiod,
photoperiodism,
photophilic,
photophilous,
photophobia,
photophobic
Example sentences from the Web for photoperiod
These captives had been kept for several months at a temperature of 21 degrees Centigrade, and on a daily photoperiod of 15 hours.
The mice were kept in a room in which temperature and photoperiod were controlled.
Broad limits to functional reproductive activity seem to be set by the photoperiod—neuroendocrine system.
The Breeding Birds of Kansas |Richard F. JohnstonIn general, Tb's showed a marked circadian cycle in phase with photoperiod.
British Dictionary definitions for photoperiod
photoperiod
/ (ˌfəʊtəʊˈpɪərɪəd) /
noun
the period of daylight in every 24 hours, esp in relation to its effects on plants and animals
See also photoperiodism
Derived forms of photoperiod
photoperiodic, adjective photoperiodically, adverbMedical definitions for photoperiod
photoperiod
[ fō′tō-pîr′ē-əd ]
n.
The duration of an organism's daily exposure to light, considered especially with regard to the effect of such exposure on growth and development.
Other words from photoperiod
pho′to•pe′ri•od′ic (-ŏd′ĭk) null adj.Scientific definitions for photoperiod
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.