photoperiod Hear it!

photoperiod Definition

photo·peri·od (fōt′ō pir′ē əd)

noun

the number of daylight hours best suited to the growth and maturation of an organism

photoperiod Related Forms
pho′to·pe′ri·od′ic (-pir′ē äd′ik) adjective
photoperiod Usage Examples

Adjective modifier

  • critical: In the case of hamsters the critical photoperiod is 12.5 hours.
  • inductive: The time taken to form primordia varies with the length of the inductive photoperiod.

Modifies a noun

  • manipulation: The analysis of the egg production records was used to evaluate the success of photoperiod manipulation in each group.
  • change: THC production is probably associated with the induction of flowering resulting from the photoperiod change.

Noun used with modifier

  • h: The isolates were cultured at 22°C with a 12 h photoperiod.