( physics) a rate of change of velocity

the act of accelerating; increasing the speed

an increase in speed; " modern science caused an acceleration of cultural change"

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.

The act of increasing speed; the state of being increased in speed; the rate of increase of velocity.

An increase in rapidity.

The act of hastening: increase of speed.

Act of quickening motion; increased speed.

The act of accelerating; the state of being accelerated. Acceleration of the moon, her increase of mean motion, compared with the diurnal motion of the earth, being about 10" in a hundred years. Acceleration of a planet is when its real diurnal motion exceeds its mean diurnal motion. The diurnal acceleration of the fixed stars is the time by which they, in one revolution, anticipate the mean diurnal revolution of the sun, which is nearly 3'50" of mean time sooner each day.

It is space that takes the strain, but in normal cases, unless the masses are very large, no considerable acceleration is produced over any great distance. – Invaders from the Infinite by John Wood Campbell

The terrific acceleration made breathing a little uncomfortable, but it was not too bad. – Rip Foster in Ride the Gray Planet by Harold Leland Goodwin

The result is a great increase in muscle tone, acceleration of peristalsis and eventually, after several dozens of repetitions, a considerable reduction of transit time. – How and When to Be Your Own Doctor by Dr. Isabelle A. Moser with Steve Solomon

The new Committee would be concerned, among other things, with the acceleration of our economy's growth and the living standards of our people, their health and education, their better assurance of life and liberty and their greater opportunities. – Complete State of the Union Addresses from 1790 to the Present by Various

I'm afraid that steady one- gee acceleration has left me unprepared for this low gravity. – Anything You Can Do ... by Gordon Randall Garrett

Hoskins went to the bulkhead and dropped a second acceleration couch. – Breaking Point by James E. Gunn

By the simplest of means: acceleration. – Raiders of the Universes by Donald Wandrei

But he was nowhere to be seen; and now, with a sudden acceleration of the powerful six- cylinder engine, the big gray car moved smoothly forward. – The Air Trust by George Allan England

In a moment acceleration plucked at them. – Rip Foster in Ride the Gray Planet by Harold Leland Goodwin

But after six seconds at two gravities acceleration the rocket burned out. – Space Tug by Murray Leinster

And the rate of acceleration increases. – This Crowded Earth by Robert Bloch

The Magellan plunged on, in constant acceleration, moving outward to the farthest limit of the solar system. – The Secret of the Ninth Planet by Donald Allen Wollheim

It was a monster, but a falling object on Mars has less than half the acceleration it does on Earth. – Duel on Syrtis by Poul William Anderson

He found that the acceleration of a body by a force is inversely proportional to its mass, and formulated the equation that force equals mass time acceleration. – Our Legal Heritage, 4th Ed. by S. A. Reilly

Thus, we say it is a law of oxygen and hydrogen to combine in definite proportions, under suitable conditions, to form water; a law of all particles of matter in the universe to tend to move towards one another with a definite acceleration; a law of living organisms to reproduce their kind. – Ontology or the Theory of Being by Peter Coffey

The two outstanding features of the new order were the rise of machine industry with its incalculable acceleration of mass- production, and the correlative development of cheap and rapid transportation. – The Rising Tide of Color Against White World-Supremacy by Theodore Lothrop Stoddard

Still without speaking, Kelly turned and ran back to her dispensary to be ready for the next acceleration. – Code Three by Rick Raphael

" You would have been last week," answered the other; while a sudden chill struck through me as I remembered the promised acceleration of the transcontinental express. – The Mistress of Bonaventure by Harold Bindloss

Hour after hour the great globe drove on at maximum acceleration, captain and every control officer alert and at high tension. – Triplanetary by Edward Elmer Smith

I sought my wrist, found the artery, made allowance for its possible acceleration, began to count. – The Metal Monster by A. Merritt