accelerator definition
(ăk-sĕl′ə-rā′tər) n. 1. A device, especially the gas pedal of a motor vehicle, for increasing speed. 2. Chemistry A substance that increases the speed of a reaction. 3. Physics A particle accelerator. Definition of accelerator for English Language Learners. : 1  a pedal in a vehicle that is pressed down to make the vehicle go faster. : 2  a machine that causes charged particles (such as electrons and protons) to move at extremely high speeds. Medical Definition of accelerator. : one that accelerates: asa: a muscle or nerve that speeds the performance of an action a cardiac acceleratorb: a substance that speeds a chemical reactionc: an apparatus for imparting high velocities to charged particles (as electrons) accelerator pedal, gas pedal, throttle, gas, gun. 1  aeroplane, airplane, plane - an aircraft that has a fixed wing and is powered by propellers or jets; the flight was delayed due to trouble with the airplane. accelerator, prothrombin conversion, I. n (factor V, labile factor, plasma accelerator globulin, proaccelerin, serum accelerator globulin), a substance that is considered by some to be a factor in serum and plasma that catalyzes the conversion of inactive prothrombin to an active form. accelerator - a valve that regulates the supply of fuel to the engine. throttle, throttle valve. fuel system - equipment in a motor vehicle or aircraft that delivers fuel to the engine. valve - control consisting of a mechanical device for controlling the flow of a fluid. Definition of accelerator for English Language Learners. : a pedal in a vehicle that is pressed down to make the vehicle go faster. (ækˌsɛl əˈreɪ ʃən) n. 1. the act of accelerating; increase of speed or velocity. 2. a change in velocity. 3. the time rate of change of velocity with respect to magnitude or direction; the derivative of velocity with respect to time. accelerator (aksel´ərātur), n 1. a substance that increases rapidity of action or function. n 2. a catalyst or other substance that hastens a chemical reaction (e.g., NaCl added to water and plaster to hasten the set). (ækˌsɛləˈreɪʃən) n. 1. the act of accelerating or the state of being accelerated. 2. (General Physics) the rate of increase of speed or the rate of change of velocity. Symbol: a. 3. (General Physics) the power to accelerate.
A pedal in a vehicle that is pressed down to make the vehicle go faster.