"accelerators" in the noun sense
1. accelerator, accelerator pedal, gas pedal, gas, throttle, gun
a pedal that controls the throttle valve
"he stepped on the gas"
2. accelerator, throttle, throttle valve
a valve that regulates the supply of fuel to the engine
3. catalyst, accelerator
chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
4. accelerator, particle accelerator, atom smasher
a scientific instrument that increases the kinetic energy of charged particles
Source: WordNet® (An amazing lexical database of English)
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