accelerator /ɪkˈsɛləˌreɪtɚ/ noun plural accelerators
plural accelerators
Learner's definition of ACCELERATOR
[count]
1
: a pedal in a vehicle that is pressed down to make the vehicle go faster(汽车等的)油门 — called also (US) gas pedal
— see picture at car 2
technical : a machine that causes charged particles (such as electrons and protons) to move at extremely high speeds(带电粒子)加速器