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electron volt

[ ih-lek-tron-vohlt ]

noun

, Physics.
  1. a unit of energy, equal to the energy acquired by an electron accelerating through a potential difference of one volt and equivalent to 1.602 × 10 −19 joules. : eV, ev


electron volt

  1. A unit used to measure the energy of subatomic particles. One electron volt is defined as the energy needed to move an electron (which has an electric charge equal to −1) across an electric potential of one volt.


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Word History and Origins

Origin of electron volt1

First recorded in 1925–30

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