ELEMENTARY SCHOOL PUNCTUATION QUIZ
OTHER WORDS FROM photoperiodpho·to·pe·ri·od·ic [foh-tuh-peer-ee-od-ik] /ˌfoʊ təˌpɪər iˈɒd ɪk/, pho·to·pe·ri·od·i·cal, adjectivepho·to·pe·ri·od·i·cal·ly, adverb
Words nearby photoperiod
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. Johnston
In general, Tb's showed a marked circadian cycle in phase with photoperiod.