solar day definition
Define the English word solar day below. Solar day is a noun. Also define these 0 related words and terms: .
- (astronomy) one day of solar time, the time between successive noons; the time in which a planet such as Earth apparently rotates once around its axis, relative to the sun (on Earth about 24 hours as an average - the length of solar day is not constant throughout the year)
time for a planet to rotate once relative to the sun