Astronomy. the time interval between two successive transits by the sun of the meridian directly opposite that of the observer; the 24-hour interval from one midnight to the following midnight.
Law. the period of time from sunrise to sunset.
the period of time during which the earth makes one complete revolution on its axis relative to the sun See day (sense 6)
See under solar time.
noun 1. See under eclipse (def 1a). noun 1. Astronomy. the obscuration of the light of the moon by the intervention of the earth between it and the sun (lunar eclipse) or the obscuration of the light of the sun by the intervention of the moon between it and a point on the earth (solar […]
- Solar elastosis
solar elastosis n. Elastosis in the sun-exposed skin of old persons or in those who have chronic actinic damage.
- Solar-electric propulsion
solar-electric propulsion A form of ionic propulsion in which the power for the ion engine is provided by solar cells.
noun 1. energy derived from the sun in the form of solar radiation. solar energy noun 1. energy obtained from solar power solar energy The radiant energy emitted by the Sun. Energy derived from the Sun’s radiation. Passive solar energy can be exploited through architectural design, as by positioning windows to allow sunlight to enter […]