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electron - 10 dictionary results
e⋅lec⋅tron
[i-lek-tron] 
–noun
| 1. | Also called negatron. Physics, Chemistry. an elementary particle that is a fundamental constituent of matter, having a negative charge of 1.602 × 10−19 coulombs, a mass of 9.108 × 10−31 kilograms, and spin of 1/2 , and existing independently or as the component outside the nucleus of an atom. |
| 2. | Electricity. a unit of charge equal to the charge on one electron. |
Origin:
term 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 perh. accidental allusion to Gk
lektron amber (see electric )
term 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 perh. accidental allusion to Gk
lektron amber (see electric )
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To 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 grams and a unit negative electric charge of approximately 1.602 × 10-19 coulombs. See Table at subatomic particle. [electr(ic) + -on1.] |
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Electron
E*lec"tron\, [NL., fr. Gr. ?. See Electric.] (Physics & Chem.) One of those particles, having about one thousandth the mass of a hydrogen atom, which are projected from the cathode of a vacuum tube as the cathode rays and from radioactive substances as the beta rays; -- called also corpuscle. The electron carries (or is) a natural unit of negative electricity, equal to 3.4 x 10^-10 electrostatic units. It has been detected only when in rapid motion; its mass, which is electromagnetic, is practically constant at the lesser speeds, but increases as the velocity approaches that of light. Electrons are all of one kind, so far as known, and probably are the ultimate constituents of all atoms. An atom from which an electron has been detached has a positive charge and is called a coelectron.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : electron
Spanish:
electrón,
German:
das Elektron,
Japanese:
電子
electron [(i-lek-tron)]
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.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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electron
coined 1891, from electric; electronic is 1902 in the sense of "pertaining to electrons;" 1930 as "pertaining to electronics." Electronics (1910) is the branch of physics and technology concerned with the penomenon of electrons in vacuums, gas, semi-conductors, etc.
Online Etymology Dictionary, © 2001 Douglas Harper
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Main Entry: elec·tron
Pronunciation: i-'lek-"trän
Function: noun
: an elementary particle consisting of a charge of negative electricity equal toabout 1.602 × 10−19coulomb and having a mass when at rest of about 9.109534 × 10−28gram or about 1/1836 that ofa proton
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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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.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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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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The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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electron electronics
A 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)
The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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