acceleration

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

Acceleration \Ac*cel'er*a"tion\, noun [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}.

A period of social improvement, or of intellectual advancement, contains within itself a principle of acceleration. --I. Taylor. (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.

From WordNet (r) 3.0 (2006) [wn]:

acceleration

noun

1: an increase in rate of change; "modern science caused an acceleration of cultural change" [ant: {deceleration}, {retardation}, {slowing}]

2: the act of accelerating; increasing the speed [syn: {acceleration}, {quickening}, {speedup}] [ant: {deceleration}]

3: (physics) a rate of increase of velocity [ant: {deceleration}]


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