accelerator

1. A pedal that controls the throttle valve (synset 102673313)
   "he stepped on the gas"
   is a type of: foot lever, foot pedal, pedal, treadle - a lever that is operated with the foot
   is a part of:

   • aeroplane, airplane, plane - an aircraft that has a fixed wing and is powered by propellers or jets
   • auto, automobile, car, machine, motorcar - a motor vehicle with four wheels; usually propelled by an internal combustion engine
   same as: accelerator pedal, gas, gas pedal, gun, throttle
2. A valve that regulates the supply of fuel to the engine (synset 102672816)
   is a type of: valve - control consisting of a mechanical device for controlling the flow of a fluid
   is a part of: fuel system - equipment in a motor vehicle or aircraft that delivers fuel to the engine
   same as: throttle, throttle valve
3. (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected (synset 114747789)
   referred to in: chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
   is a type of: activator - (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription
   subtypes:

   • biocatalyst - a biochemical catalyst such as an enzyme
   • enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
   • platinum black - a fine black powder of platinum; used as a catalyst in chemical reactions
   same as: catalyst
4. A scientific instrument that increases the kinetic energy of charged particles (synset 102673012)
   is a type of: scientific instrument - an instrument used by scientists
   subtypes:

   • betatron, induction accelerator - accelerates a continuous beam of electrons to high speeds by means of the electric field produced by changing magnetic flux
   • charge-exchange accelerator - an accelerator in which high-energy ions escape from plasma following charge exchange
   • cockcroft and walton accelerator, cockcroft and walton voltage multiplier, cockcroft-walton accelerator, cockcroft-walton voltage multiplier - a high-voltage machine in which rectifiers charge capacitors that discharge and drive charged particles through an accelerating tube
   • collider - an accelerator in which two beams of particles are forced to collide head on
   • cyclotron - an accelerator that imparts energies of several million electron-volts to rapidly moving particles
   • linac, linear accelerator - ions are accelerated along a linear path by voltage differences on electrodes along the path
   has: storage ring - container consisting of a set of magnets set in a doughnut-shaped ring around which charged particles from an accelerator can be kept circulating until they are used
   same as: atom smasher, particle accelerator

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