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]:



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}]

The dictionary definitions are retrieved from a local copy of two of the open source DICT dictionaries. Click here for the database copyright information. DEFINE.COM is registered as an educational NONPROFIT corporation. We aim to please around here. We believe in using positive reinforcement to get things done. We make suggestions that are intended to make life more enjoyable. We think about efficiency, automation, security, PRIVACY, social and ecological responsibility and positive HUMANITARIAN ethics and VALUES. We are benevolent. DO NO HARM is our motto.

Saturday, March 28, 2015 12:14:58 PM Coordinated Universal Time (UTC)