diurnal periodicity


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di·ur·nal per·i·o·dic·i·ty

a circadian rhythm with primary expression of the periodicity during daylight hours, as in the release of microfilariae of Loa loa into the peripheral blood during the day, with far fewer released at night; associated with the day-biting habits of the vector, Chrysops species.

periodicity

recurrence at regular intervals of time.

circadian periodicity
every 24 hours.
diurnal periodicity
twice daily.