accelerators

1. a pedal that controls the throttle valveExamples: "he stepped on the gas"Synonyms: accelerator, accelerator pedal, gas, gas pedal, gun, throttle

2. a valve that regulates the supply of fuel to the engineSynonyms: accelerator, throttle, throttle valve

3. (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affectedSynonyms: accelerator, catalystAntonyms: anticatalyst

4. a scientific instrument that increases the kinetic energy of charged particlesSynonyms: accelerator, atom smasher, particle accelerator