mean solar day

Found in Anh - Anh (Wordnet)

Definition Noun : A standard unit of time measurement : A "mean solar day" is the average length of a solar day, calculated over a year. It represents the time it takes for the Earth to complete one full rotation on its axis relative to the Sun, averaged to account for small variations throughout the year. It is the basis for the 24-hour day. Usage The term "mean solar day" is used in precise s...