electron
Use Electron in a sentence
trɒnterm first suggested in 1891 by Irish physicist G. J. Stoney (1826–1911); electr(ic) + -on (from the names of charged particles, as ion, cation, anion) with perhaps accidental allusion to Greek ḗlektron amber (see electric)
Based on the Random House Dictionary, © Random House, Inc. 2013.
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electron (ɪˈlɛktrɒn) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| a stable elementary particle present in all atoms, orbiting the nucleus in numbers equal to the atomic number of the element in the neutral atom; a lepton with a negative charge of 1.602 176 462 × 10--19 coulomb, a rest mass of 9.109 381 88 × 10--31 kilogram, a radius of 2.817 940 285 × 10--15 metre, and a spin of ½ | |
| [C19: from | |
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| any of a large group of fat-soluble organic compounds, as the sterols, bile acids, and sex hormones, most of which have specific physiological action. |
| the most important of the male sex hormones, both males and females have it, but the additional testosterone in males stimulates the growth of the male sex organs in the fetus and the development of the male sex characteristics during puberty |
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electron e·lec·tron (ĭ-lěk'trŏn')
n.
Abbr. e
A stable subatomic particle in the lepton family having a rest mass of 9.1066 × 10-28 gram and a unit negative electric charge of approximately 1.602 × 10-19 coulomb. Also called negatron.
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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electron (ĭ-lěk'trŏn') Pronunciation Key
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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An elementary particle with a negative charge and a very small mass. Electrons are normally found in orbits around the nucleus of an atom. The chemical reactions that an atom undergoes depend primarily on the electrons in the outermost orbits (the valence electrons).
Note: The movement of large numbers of electrons through conductors constitutes an electric current.
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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electron definition
electronicsA sub-atomic particle with a negative quantised charge. A flow of electrical current consists of the unidirectional (on average) movement of many electrons. The more mobile electrons are in a given material, the greater it electrical conductance (or equivalently, the lower its resistance).
(1995-10-06)
