Photoperiod is a 11 letter English word. It's valid Words with friends word worth 20 points.
You can make 456 anagrams from letters in photoperiod (dehiooopprt).
First recorded in 1915-20; photo- + period
Broad limits to functional reproductive activity seem to be set by the photoperiod—neuroendocrine system.
In general, Tb's showed a marked circadian cycle in phase with 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.
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