electron volt

electron-volt

[ih-lek-tron-vohlt]
noun Physics.
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. Abbreviation: eV, ev
Also, electron volt.


Origin:
1925–30

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American Heritage
Medical Dictionary

electron volt n.
Abbr. eV, ev
A unit of energy equal to the energy acquired by an electron falling through a potential difference of one volt, approximately 1.602 × 10-19 joule.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
electron volt  
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

electron volt

unit of energy commonly used in atomic and nuclear physics, equal to the energy gained by an electron (a charged particle carrying unit electronic charge when the electrical potential at the electron increases by one volt). The electron volt equals 1.602 10-12 erg. The abbreviation MeV indicates 106 (1,000,000) electron volts and GeV, 109 (1,000,000,000).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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