Acceleration of the planets
Acceleration Ac*cel`er*a"tion, n. [L. acceleratio: cf. F. acc['e]l['e]ration.] The act of accelerating, or the state of being accelerated; increase of motion or action; as, a falling body moves toward the earth with an acceleration of velocity; -- opposed to {retardation}. [1913 Webster]

A period of social improvement, or of intellectual advancement, contains within itself a principle of acceleration. --I. Taylor. [1913 Webster] (Astr. & Physics.)

{Acceleration of the moon}, the increase of the moon's mean motion in its orbit, in consequence of which its period of revolution is now shorter than in ancient times.

{Acceleration} and {retardation of the tides}. See {Priming of the tides}, under {Priming}.

{Diurnal acceleration of the fixed stars}, the amount by which their apparent diurnal motion exceeds that of the sun, in consequence of which they daily come to the meridian of any place about three minutes fifty-six seconds of solar time earlier than on the day preceding.

{Acceleration of the planets}, the increasing velocity of their motion, in proceeding from the apogee to the perigee of their orbits. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Acceleration of the moon — Acceleration Ac*cel er*a tion, n. [L. acceleratio: cf. F. acc[ e]l[ e]ration.] The act of accelerating, or the state of being accelerated; increase of motion or action; as, a falling body moves toward the earth with an acceleration of velocity;… …   The Collaborative International Dictionary of English

  • Diurnal acceleration of the fixed stars — Acceleration Ac*cel er*a tion, n. [L. acceleratio: cf. F. acc[ e]l[ e]ration.] The act of accelerating, or the state of being accelerated; increase of motion or action; as, a falling body moves toward the earth with an acceleration of velocity;… …   The Collaborative International Dictionary of English

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  • retardation of the tides — Acceleration Ac*cel er*a tion, n. [L. acceleratio: cf. F. acc[ e]l[ e]ration.] The act of accelerating, or the state of being accelerated; increase of motion or action; as, a falling body moves toward the earth with an acceleration of velocity;… …   The Collaborative International Dictionary of English

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