accelerator
ac·cel·er·a·tor
/ıkˈsɛləˌreıtɚ/ noun , pl -tors [ count ]
1 : a pedal in a vehicle that is pressed down to make the vehicle go faster
hit/press the accelerator = step on the accelerator
— called also (US) gas pedal
2 technical : a machine that causes charged particles (such as electrons and protons) to move at extremely high speeds
a particle accelerator
