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acceleration

[ak-sel-uh-rey-shuh n] /ækˌsɛl əˈreɪ ʃən/
noun
1.
the act of accelerating; increase of speed or velocity.
2.
a change in velocity.
3.
Mechanics. the time rate of change of velocity with respect to magnitude or direction; the derivative of velocity with respect to time.
Origin
1525-1535
1525-35; < Latin accelerātiōn- (stem of accelerātiō). See accelerate, -ion
Related forms
nonacceleration, noun
overacceleration, noun
reacceleration, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for acceleration
  • With the added weight of people and supplies, it would simply take too long for the craft to reach acceleration speed.
  • Observe the speed limit and avoid rapid acceleration or braking.
  • Inertia sensors are faster, but less accurate, providing only acceleration and rotation speed.
  • For heavy acceleration and high speed, these vehicles rely on power from both an internal combustion engine and an electric motor.
  • Units fell 13.3% in 2010, a steep acceleration after units declined 3.7% in 2009.
  • Technology both caters to and fosters our acceleration.
  • There's an acceleration of e-books into the library market.
  • The increased velocity is attributed to acceleration caused by magnetic waves spiraling from the sun.
  • In a best-case scenario, these efforts will also stop the acceleration of global warming.
  • We know that the acceleration of a falling body is the constant g.
British Dictionary definitions for acceleration

acceleration

/ækˌsɛləˈreɪʃən/
noun
1.
the act of accelerating or the state of being accelerated
2.
the rate of increase of speed or the rate of change of velocity a
3.
the power to accelerate a
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for acceleration
n.

1530s, from Latin accelerationem (nominative acceleratio) "a hastening," noun of action from past participle stem of accelerare (see accelerate).

Online Etymology Dictionary, © 2010 Douglas Harper
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acceleration in Science
acceleration
  (āk-sěl'ə-rā'shən)   
The rate of change of the velocity of a moving body. An increase in the magnitude of the velocity of a moving body (an increase in speed) is called a positive acceleration; a decrease in speed is called a negative acceleration. Acceleration, like velocity, is a vector quantity, so any change in the direction of a moving body is also an acceleration. A moving body that follows a curved path, even when its speed remains constant, is undergoing acceleration. See more at gravity, relativity.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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acceleration in Culture

acceleration definition


A change in the velocity of an object.

Note: The most familiar kind of acceleration is a change in the speed of an object. An object that stays at the same speed but changes direction, however, is also being accelerated. (See force.)
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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