From Encyclopedia Jr, free information reference for Kids
Diurnal ("daily") may refer to:
- Diurnal animal, a plant or animal that is active in the daytime
- Diel, actions which are completed in 24 hours and are repeated every 24 hours; this can be seen in the diurnal temperature variation
- Diurnal motion, 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
- Diurnal phase shift, the phase shift of electromagnetic signals associated with daily changes in the ionosphere
In astrology:
- Diurnal planet, a planet in a sect for which the Sun is above the horizon
- Diurnal chart, a chart for a given date, based on the natal chart
- Diurnal arc, the time, as expressed in right ascension, it takes a planet, point, or degree to move from its rising point to its setting point
- Diurnal sign, a sign in the zodiac whose natural positions are on the southern hemisphere of the horoscope
