13 results for: electron

Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

e·lec·tron

Audio Help [i-lek-tron] Pronunciation Key

–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)

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopædia Britannica, Inc.
electron

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American Heritage Dictionary - Cite This Source - Share This

e·lec·tron Audio Help (ĭ-lěk'trŏn') Pronunciation Key
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.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

Online Etymology Dictionary - Cite This Source - Share This
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.

WordNet - Cite This Source - Share This

electron
noun
an elementary particle with negative charge

Kernerman English Multilingual Dictionary (Beta Version) - Cite This Source - Share This
electron [iˈlektron] noun

a very small particle within the atom

Arabic:	إلِكْترون
Chinese (Simplified):	电子
Chinese (Traditional):	電子
Czech:	elektron
Danish:	elektron
Dutch:	elektron
Estonian:	elektron
Finnish:	elektroni
French:	électron
German:	das Elektron
Greek:	ηλεκτρόνιο
Hungarian:	elektron
Icelandic:	rafeind
Indonesian:	elektron
Italian:	elettrone

Japanese:	電子
Korean:	전자
Latvian:	elektrons
Lithuanian:	elektronas
Norwegian:	elektron
Polish:	elektron
Portuguese (Brazil):	elétron
Portuguese (Portugal):	electrão
Romanian:	electron
Russian:	электрон
Slovak:	elektrón
Slovenian:	elektron
Spanish:	electrón
Swedish:	elektron
Turkish:	elektron

See also: electronic, electronics, electronic mail

The American Heritage Science Dictionary - Cite This Source - Share This

electron Audio Help (ĭ-lěk'trŏn') Pronunciation Key

A stable elementary particle in the lepton family having a mass at rest of 9.107 × 10^-28 grams and an electric charge of approximately -1.602 × 10^-19 coulombs. Electrons orbit about the positively charged nuclei of atoms in distinct orbitals of different energy levels, called shells. Electrons are the primary charge carriers in electric current. Compare positron. See also electromagnetism , elementary particle , ion. See Table at subatomic particle.
A positron or a negatron. See more at negatron.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

American Heritage New Dictionary of Cultural Literacy, Third Edition - Cite This Source - Share This
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.

[Chapter:] Physical Sciences and Mathematics

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

American Heritage Stedman's Medical Dictionary - Cite This Source - Share This

e·lec·tron (-lktrn)
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.

Merriam-Webster's Medical Dictionary - Cite This Source - Share This

Main Entry: elec·tron
Pronunciation: i-'lek-"trän
Function: noun
: an elementary particle consisting of a charge of negative electricity equal to about 1.602 × 10⁻¹⁹coulomb and having a mass when at rest of about 9.109534 × 10⁻²⁸gram or about ¹/₁₈₃₆ that of a proton

Free On-line Dictionary of Computing - Cite This Source - Share This

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)