n. 1 a device for increasing speed, esp. the pedal that controls the speed of a vehicle's engine. 2 Physics an apparatus for imparting high speeds to charged particles. 3 Chem. a substance that speeds up a chemical reaction.
ACCELERATOR
Meaning of ACCELERATOR in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012