accelerator
Pronunciation: /əkˈsɛləreɪtə/
noun
- something which brings about acceleration, in particular:
- a device, typically a foot pedal, which controls the speed of a vehicle’s engine: he pressed the accelerator to the floor and the taxi shot forward
- Physics an apparatus for accelerating charged particles to high velocities: electron accelerators
- a substance that speeds up a chemical process, typically the vulcanization of rubber or the curing of a plastic.