acceleration
1. The act of accelerating. 2. The rate of increase in velocity per unit of time; commonly expressed in g units; also expressed in centimeters or feet per second squared. 3. The rate of increasing deviation from a rectilinear course. See radial a.. [see accelerator]
- angular a. the rate of change of angular velocity; e.g., when a centrifuge rotor is speeding up, or when there is a simultaneous change in velocity and direction, as in an aircraft in a tight spin.
- linear a. the rate of change of velocity without a change in direction; e.g., when the speed of an aircraft increases while flying a straight pathway.
- radial a. the centripetal a. of a particle or vehicle moving along a curved path at a constant velocity; e.g., turning a curve in an automobile, pulling out of a dive, or performing a loop maneuver in an aircraft. In aviation, a. varies directly with the square of the air speed and inversely with the radius of the turn (a = V2r, where V is air speed and r is radius of turn).

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ac·cel·er·a·tion ik-.sel-ə-'rā-shən, (.)ak- n
1) the act or process of accelerating: the state of being accelerated
2) change of velocity also the rate of this change
3) advancement in mental growth or achievement beyond the average for one's age

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ac·cel·er·a·tion (ak-sel″ər-aґshən) [L. acceleratio, from ad- intensification + celerare to quicken] 1. a quickening, as of the pulse rate or respiration. 2. in physics, the time rate of change of velocity; symbol a>.

Medical dictionary. 2011.

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  • accélération — [ akselerasjɔ̃ ] n. f. • 1327; lat. acceleratio, de accelerare 1 ♦ Cour. Augmentation de vitesse. L accélération d un mouvement. Cette voiture a des accélérations foudroyantes. Fig. Le fait d aller plus vite. L accélération du pouls, de la… …   Encyclopédie Universelle

  • Acceleration — Accélération L accélération désigne couramment une augmentation de la vitesse; en physique, plus précisément en cinématique, l accélération est une grandeur vectorielle qui indique la modification affectant la vitesse d un mouvement en fonction… …   Wikipédia en Français

  • acceleration — I noun dispatch, expedition, expeditious performance, hastening, hurrying, increase of speed, quickening, shortening of time, speedup, spurt, stepping up a pace associated concepts: acceleration clause, acceleration doctrine, acceleration of a… …   Law dictionary

  • Acceleration — Ac*cel er*a tion, n. [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… …   The Collaborative International Dictionary of English

  • Acceleration — Ac*cel er*a tion, n. [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… …   The Collaborative International Dictionary of English

  • acceleration — of a point is the time rate of change of the velocity of the point. centripetal acceleration lateral acceleration longitudinal acceleration normal acceleration side acceleration vehicle acceleration …   Mechanics glossary

  • acceleration — The termination of the debtor s right to pay a debt in installments or at a future maturity date. If a debt is accelerated, the debt becomes immediately due and payable. Many contracts have acceleration clauses entitling the creditor to allow for …   Glossary of Bankruptcy

  • Acceleration — Acceleration, Beschleunigung, beschleunigende Kraft, die ein Körper auf die Bewegung eines andern ausübt. – 2. Acceleration des Mondes nennt die Astronomie die Beschleunigung des Mondlaufes um die Erde, in Folge deren dieser immer kürzer wird,… …   Herders Conversations-Lexikon

  • acceleration — Acceleration. subst. f. v. L action d accelerer. Il faut faire telle chose pour l acceleration de l ouvrage …   Dictionnaire de l'Académie française

  • Acceleration — (v. lat.), 1) Beschleunigung; bes. 2) Vermehrung der Geschwindigkeit; so: A. des Mondes, die immer größer werdende Geschwindigkeit des Mondes, od. die immer kürzere Umlaufszeit des Mondes um die Erde, s. u. Mond; A. der Fixsterne, Verfrühung der… …   Pierer's Universal-Lexikon

  • Acceleration — Acceleration, s. Beschleunigung …   Lexikon der gesamten Technik

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