accelerator
nounUK /əkˈseləreɪtə/
US /əkˈseləreɪtər/
The pedal in a car that you press to make it go faster.
She pressed the accelerator to speed up on the highway.
OTHER MEANINGS
2. A machine that makes tiny particles move very fast for science experiments.
Scientists used a particle accelerator to study atoms.
3. Something that makes a process happen faster or grow more quickly.
The new software acted as an accelerator for the company's growth.
4. A substance that makes a chemical reaction happen faster.
The chemist added an accelerator to speed up the reaction.