accelerator

/æk'seləreitə/
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accelerator

A scientist adjusts the controls of a particle accelerator in the laboratory.

Definition
  1. Noun:
    • A scientific instrument: A device, often very large and complex, that uses electromagnetic fields to propel charged particles (like electrons or protons) to very high speeds and energies. These are used for research in physics.
    • A substance in chemistry: A catalyst; a substance that increases the rate of a chemical reaction without being consumed or permanently changed in the process.
    • A pedal in a vehicle: The foot-operated control in a motor vehicle that regulates the flow of fuel to the engine, thereby controlling the vehicle's speed. Commonly called the "gas pedal."
    • A mechanical valve: A device, often linked to the accelerator pedal, that regulates the supply of fuel or the air-fuel mixture to an engine.
Examples of Usage
  • Noun (Scientific Instrument):
    • Scientists at CERN use a large particle accelerator to study fundamental particles.
    • The new linear accelerator can achieve energies previously thought impossible.
  • Noun (Chemical Substance):
    • This compound acts as an accelerator in the vulcanization of rubber.
    • Adding an accelerator to the epoxy resin will make it harden much faster.
  • Noun (Vehicle Pedal):
    • She pressed the accelerator to merge onto the highway.
    • The driver took his foot off the accelerator as he approached the curve.
Advanced Usage
  • "Particle accelerator": The full, precise term for the scientific instrument.
    • The Large Hadron Collider is the world's most powerful particle accelerator.
  • "Step on the accelerator": An idiom meaning to press the gas pedal, often to go faster.
    • When the light turned green, he stepped on the accelerator.
Variants and Related Words
  • Accelerate (verb): To increase in speed or rate.
    • The car began to accelerate rapidly.
  • Acceleration (noun): The act or process of accelerating; the rate of change of velocity.
    • The sports car has impressive acceleration.
  • Catalyst (noun): A close synonym in the chemical sense.
  • Throttle (noun/verb): A related term for the valve or lever that controls engine power; often used interchangeably with "accelerator" in the context of the pedal.
Synonyms
  • For the pedal: Gas pedal, throttle.
  • For the chemical agent: Catalyst, promoter.
  • For the scientific machine: Particle accelerator, atom smasher (informal).
Related Phrasal Verbs/Idioms
  • "Put the pedal to the metal": An informal idiom meaning to drive very fast or to accelerate hard, directly related to pressing the accelerator pedal.
    • If we want to get there on time, we'll have to put the pedal to the metal.
accelerator

A scientist adjusts the controls of a particle accelerator in the laboratory.

Noun
  1. a scientific instrument that increases the kinetic energy of charged particles
  2. (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
  3. a valve that regulates the supply of fuel to the engine
  4. a pedal that controls the throttle valve
    • he stepped on the gas

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