noun a diurnal plant or animal
adjective relating to or occurring in the daytime; daily
In psychology, diurnal variations in mood or cognitive function may be studied in relation to circadian rhythms.
In astronomy, diurnal motion refers to the apparent daily motion of celestial objects due to the rotation of the Earth.
In meteorology, diurnal temperature variations refer to the daily fluctuations in temperature that occur over a 24-hour period.
In ecology, diurnal patterns refer to daily cycles of activity and rest in organisms.
In biology, diurnal refers to animals that are active during the day, such as diurnal birds of prey.
In literature, a writer may use the term 'diurnal' to describe a character who is active during the day.
Psychologists may use the term 'diurnal' when discussing diurnal variations in mood or behavior.
Biologists may refer to diurnal animals, which are active during the day, as opposed to nocturnal animals.
Meteorologists may use the term 'diurnal temperature range' to describe the difference between the high and low temperatures in a day.
Botanists may use the term 'diurnal plants' to refer to plants that open their flowers during the day and close them at night.