mean sun time
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mean solar time — n. time based on the mean sun: used as the basis for standard time because it has exactly equal divisions: also mean time … English World dictionary
mean solar time — mean′ so′lar time n. astron. time measured by the hour angle of the mean sun. Also called mean′ time … From formal English to slang
mean solar time — noun (astronomy) time based on the motion of the mean sun (an imaginary sun moving uniformly along the celestial equator) • Syn: ↑mean time • Topics: ↑astronomy, ↑uranology • Hypernyms: ↑time unit, ↑ … Useful english dictionary
mean solar time — A measure of time calculated upon the motion of a fictitious sun called the mean sun, which is imagined to move with perfect uniformity, being sometimes behind the true sun, and sometimes in advance of it. Anno: 143 ALR 1238 … Ballentine's law dictionary
mean solar time — Astron. time measured by the hour angle of the mean sun. Also called mean time. * * * … Universalium
mean solar time — noun Astronomy time reckoned by the motion of the mean sun (such as is shown by an ordinary clock). Compare with apparent time … English new terms dictionary
Mean sun — Mean Mean, a. [OE. mene, OF. meiien, F. moyen, fr. L. medianus that is in the middle, fr. medius; akin to E. mid. See {Mid}.] 1. Occupying a middle position; middle; being about midway between extremes. [1913 Webster] Being of middle age and a… … The Collaborative International Dictionary of English
mean sun — n. Astron. a hypothetical sun thought of as moving uniformly along the celestial equator at a speed equal to the actual sun s average speed along the ecliptic: hypothesized as a basis for keeping time, because the actual sun does not travel along … English World dictionary
mean sun — mean′ sun′ n. astron. an imaginary sun moving uniformly in the celestial equator and taking the same time to make its annual circuit as the true sun does in the ecliptic … From formal English to slang
mean sun — noun a theoretical sun that moves along the celestial equator at a constant speed and completes its annual course in the same amount of time the real sun takes at variable speeds • Hypernyms: ↑model, ↑theoretical account, ↑framework * * * noun… … Useful english dictionary
