Diurnal

Template:Wiktionary The term diurnal is used in a number of contexts:

In biology, a diurnal animal is an animal that is active in the daytime. This definition may also apply to plants. Compare with nocturnal or crepuscular.
In meteorology, diurnal means daily, especially pertaining to actions which are completed in 24 hours and are repeated every 24 hours; this can be seen in the diurnal temperature variation. An alternative word for diurnal in this sense is diel.
In astronomy, diurnal motion refers to the apparent motion of stars around the Earth, caused by the Earth's rotation around its axis. More generally it means repeating daily as in e.g. diurnal effect
In astrology, diurnal motion has, of course the same meaning it does in astronomy. A diurnal planet also refers to the sect of the planet--that is, whether the Sun is over the horizon in the chart in which the planet is positioned. A diurnal chart is one in which the Sun is over the horizon.