Accelerator

[ək'seləreɪtə] or [ək'sɛlə'retɚ]

(noun.) a valve that regulates the supply of fuel to the engine.

(noun.) a scientific instrument that increases the kinetic energy of charged particles.

(noun.) a pedal that controls the throttle valve; 'he stepped on the gas'.

Editor: Seth--From WordNet

(n.) One who, or that which, accelerates. Also as an adj.; as, accelerator nerves.

Checked by Harriet