accelerator pedal accelerator pedal /əkˈsɛləˌreɪtər ˈpɛdəl/

noun

1. A pedal that controls the throttle valve  ( accelerator pedal , gas pedal [ N. American] , gun , accelerator , gas [ N. American] , throttle )
   a pedal that controls the throttle valve
    He stepped on the gas
   he stepped on the gas