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deceleration
The Collaborative International Dictionary
deceleration

deceleration \deceleration\ n. a decrease in velocity. Opposite of acceleration

Syn: slowing, retardation.

Douglas Harper's Etymology Dictionary
deceleration

1894, originally in railroading, coined from de- "do the opposite of" (see de-) + (ac)celeration.\n\nVerily "deceleration" is a word which could only be coined by the Great Western.

["Engineering," Feb. 2, 1894]

Wiktionary
deceleration

n. 1 (context uncountable English) The act or process of decelerate. 2 (context countable English) The amount by which a speed or velocity decreases (and so a scalar quantity or a vector quantity).

WordNet
deceleration

n. a decrease in speed; "the deceleration of the arms race" [syn: slowing, retardation] [ant: acceleration]

Usage examples of "deceleration".

The sudden deceleration is going to cause a lot of the energy in the warpfields to blueshift and go kinetic.

If three engines were available, the ship must begin deceleration in five days or she would be going too fast to enter Jupiter orbit.

The journey from their point of entry into normal space to Makassar took another twenty-four days, with the transition from acceleration to deceleration taking place in the middle of the night.

The Hurricane shuddered and slowed to the recoil of eight Brownings, and Shasa was thrown gently forward against his shoulder-straps by the deceleration.

Even assuming they did have the later compensators and went to maximum military power with a zero safety margin, if Hexapuma turned on them this instant and went to her own max deceleration, they would meet in seventy-one minutes.

Possibly the restraints he had seen on his bed’s frame would be gentler, but the decelerations when the boat struck the ice mass were so abrupt that he doubted being horizontal would help much.

Possibly the restraints he had seen on his bed's frame would be gentler, but the decelerations when the boat struck the ice mass were so abrupt that he doubted being horizontal would help much.

He moved to where the holes were, moving the oncoming traffic over, and was able to avoid accelerations, decelerations, and the use of the brakes.

Less than an hour short of injecting Inconnu Deux into synchronous orbit, juggling deceleration to give maneuverability if he needed it, Tregare showed his impatience.

Even now, at the end of acceleration to half lightspeed and deceleration to a few hundred kilometers per second, the Cross bore several tons of reaction-mass mercury.

The experts deduced from the installation of the explosive and the detonating device--which was set to explode on a sudden deceleration, such as might be caused by contact at high relative velocity with another object--that had it come any closer to the Ship Yard it could have easily caused significant damage, not so much from the explosion itself as from the fragments propelled from the point of detonation by the explosives.

The experts deduced from the installation of the explosive and the detonating device-which was set to explode on a sudden deceleration, such as might be caused by contact at high relative velocity with another object-that had it come any closer to the ship yard it could have easily caused significant damage, not so much from the explosion itself as from the fragments propelled from the point of detonation by the explosives.

Visibility was good because of the albescence and the even spacing of the trees and to the right and left of the crossroads there was nothing in sight so I brought the speed up progressively and cleared the harder-packed area with deadpoint momentum between acceleration and deceleration, obliquely aware that if we survived this day I would for long remember her calm and rather formal question as we and our shadow flew in whiteness among the winter trees, who are you please.

This suggests explosive decompression and the exiting of body fluid through natural openings, rather than massive external injury due to a sudden deceleration or collision.

It was easy to forget that this was illusion—that in deceleration mode, with the tethered tree straining forward and a torrent of hadronic photons aimed along the probe's axis through the focus of the sheltering ramscoop fields, the scene rushing toward him was actually beneath his feet.