| accelerator | | |
| n. (artifact) | 1. accelerator, accelerator pedal, gas, gas pedal, gun, throttle | a pedal that controls the throttle valve.; "he stepped on the gas" |
| ~ aeroplane, airplane, plane | an aircraft that has a fixed wing and is powered by propellers or jets.; "the flight was delayed due to trouble with the airplane" |
| ~ auto, automobile, car, motorcar, machine | a motor vehicle with four wheels; usually propelled by an internal combustion engine.; "he needs a car to get to work" |
| ~ foot lever, foot pedal, treadle, pedal | a lever that is operated with the foot. |
| n. (artifact) | 2. accelerator, throttle, throttle valve | a valve that regulates the supply of fuel to the engine. |
| ~ fuel system | equipment in a motor vehicle or aircraft that delivers fuel to the engine. |
| ~ valve | control consisting of a mechanical device for controlling the flow of a fluid. |
| n. (substance) | 3. accelerator, catalyst | (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected. |
| ~ chemical science, chemistry | the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions. |
| ~ 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. |
| ~ 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. |
| n. (artifact) | 4. accelerator, atom smasher, particle accelerator | a scientific instrument that increases the kinetic energy of charged particles. |
| ~ 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-walton accelerator, cockcroft-walton voltage multiplier, cockcroft and walton accelerator, cockcroft and 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. |
| ~ scientific instrument | an instrument used by scientists. |
| ~ 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. |
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