AskDefine | Define accelerator

Dictionary Definition



1 a pedal that controls the throttle valve; "he stepped on the gas" [syn: accelerator pedal, gas pedal, gas, throttle, gun]
2 a valve that regulates the supply of fuel to the engine [syn: throttle, throttle valve]
3 (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected [syn: catalyst] [ant: anticatalyst]
4 a scientific instrument that increases the kinetic energy of charged particles [syn: particle accelerator, atom smasher]

User Contributed Dictionary




Often used adjectivally
  1. One who, or that which, accelerates.
  2. A device for causing acceleration.
  3. A substance which speeds up chemical reactions.
  4. accelerator pedal.

Derived terms


one who, or that which, accelerates
  • German: Beschleuniger
a device for causing acceleration
  • German: Beschleuniger
  • Swedish: accelerator
a substance which speeds up chemical reactions
  • Finnish: katalyytti
  • German: Beschleuniger, Katalysator
  • Swedish: accelerator
accelerator pedal



  1. In the context of "lang=sv|chemistry": accelerator; a substance which speeds up chemical reactions.
  2. In the context of "lang=sv|physics": accelerator; a device which accelerates different kinds of particles to large velocities

Extensive Definition

Accelerator may mean:
accelerator in French: Accélérateur
accelerator in Galician: Acelerador
accelerator in Italian: Acceleratore
accelerator in Polish: Akcelerator
accelerator in Romanian: Accelerator

Synonyms, Antonyms and Related Words

PCV valve, alternator, ammeter, atom smasher, atomic accelerator, atomic cannon, bearings, bonnet, boot, brake, bucket seat, bumper, camshaft, carburetor, chassis, choke, clutch, connecting rod, convertible top, cowl, crank, crankcase, crankshaft, cutout, cylinder, cylinder head, dash, dashboard, differential, distributor, exhaust, exhaust pipe, fan, fender, flywheel, gear, gearbox, gearshift, generator, headlight, headrest, hood, horn, ignition, intake, manifold, muffler, parking light, particle accelerator, piston, power brakes, power steering, radiator, rear-view mirror, seat belt, shock absorber, spark plug, speedometer, springs, starter, steering wheel, top, transmission, universal, valve, windscreen, windshield
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