LUNAR DAY • DICTIONARY ONE.COM • Definition of Lunar day

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/lˈunər deɪ/ Listen

Lunar day

noun

The period of time taken for the moon to make one full rotation on its axis (about 27.3 sidereal days).

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Etymology of 'Lunar day'

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"Lunar day" Quotes from Famous Books

... angular velocity with which the moon revolves around it, the ebbing and the flowing of the lunar tides must become of evanescent importance; and this indeed for a double reason, partly on account of the moon's greatly augmented distance, and partly on account of the increasing length of the lunar day, and the extremely tardy movements of ebb and flow that the lunar tides will then have. Thus the lunar tides, so far as their dynamical importance is concerned, will ultimately become zero, while the solar tides retain all ...

— Time and Tide - A Romance of the Moon • Robert S. (Robert Stawell) Ball

... similar kind of lunar action were laid by Kreil in 1841 before the Bohemian Society of Sciences, and with minor corrections were fully substantiated by Sabine's more extended researches. It was thus ascertained that each lunar day, or the interval of twenty-four hours and about fifty-four minutes between two successive meridian passages of our satellite, is marked by a perceptible, though very small, double oscillation of the needle—two progressive movements from east to west, and two returns ...

— A Popular History of Astronomy During the Nineteenth Century - Fourth Edition • Agnes M. (Agnes Mary) Clerke

Words linked to "Lunar day" : day