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English definition of “accelerator”

accelerator

noun [C]  /ɪkˈsel·əˌreɪt̬·ər, æk-/ us  

accelerator noun [C] (CHEMICAL)

chemistry a substance that is added to other substances to speed up a chemical reaction

accelerator noun [C] (SOMETHING THAT INCREASES RATE)

physics (also particle accelerator) a device used to accelerate very small pieces of nuclear material for scientific experiments

accelerator noun [C] (THING THAT MAKES SOMETHING GO FASTER)

a pedal (= part worked with the foot) in a car that makes the car go faster when pressed
(Definition of accelerator from the Cambridge Academic Content Dictionary © Cambridge University Press)
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