Longman Dictionary of Contemporary English homepage

Topic: MOTOR VEHICLES

accelerator

 noun
     
ac‧cel‧e‧ra‧tor [countable]
1TTC the part of a car or other vehicle that you press with your foot to make it go faster [= gas pedal American English]
2 technical a large machine used to make extremely small pieces of matter1 (3) move at extremely high speeds
Definition of accelerator from the Longman Dictionary of Contemporary English within
the topic MOTOR VEHICLES
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