English to English
noun
- a pedal that controls the throttle valve
He stepped on the gas.
source: WordNet 3.0
- a valve that regulates the supply of fuel to the engine
source: WordNet 3.0
- (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
source: WordNet 3.0
- a scientific instrument that increases the kinetic energy of charged particles
source: WordNet 3.0
- One who, or that which, accelerates. Also as an adj.; as, accelerator nerves.
source: Webster 1913