ACCELERATOR

Definition

1. noun a pedal that controls the throttle valve. — synonyms: accelerator_pedal, gas_pedal, gas, throttle, gun
2. noun a valve that regulates the supply of fuel to the engine. — synonyms: throttle, throttle_valve
3. noun (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected. — synonyms: catalyst
4. noun a scientific instrument that increases the kinetic energy of charged particles. — synonyms: particle_accelerator, atom_smasher