Performed in twenty-four hours, such as the diurnal rotation of the Earth.
having a daily cycle or occurring every day; "diurnal rhythms"; "diurnal rotation of the heavens"; "the diurnal slumber of bats"
(biology) belonging to or active during the day; "diurnal animals are active during the day"; "diurnal flowers are open during the day and closed at night"
belonging to or active during the day; "diurnal animals are active during the day"; "diurnal flowers are open during the day and closed at night"
