Look up Accelerator in Wiktionary, the free dictionary

The word accelerator has several possible meanings.

• A particle accelerator in physics.
• An accelerator to speed a function in computer hardware.
• Usually in the UK, and sometimes in the US, the pedal (often called the gas pedal in the US) that controls the engine speed of an automobile. See accelerator (car).
• A substance that increases the rate of a chemical reaction, such as the curing of an adhesive. See accelerator (chemistry).
• The accelerator effect in economics refers to stimulus to private fixed investment that occurs due to growth in aggregate demand.