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 ½, and existing independently or as the component outside the nucleus of an atom.
Electricity. a unit of charge equal to the charge on one electron.

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 perhaps accidental allusion to Greek ḗlektron amber (see electric) Unabridged


(not in technical use) electron ( def 1 ).
Also called negatron [neg-uh-tron] .

1928; negat(ive) + -on1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To negatron
World English Dictionary
electron (ɪˈlɛktrɒn)
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 electro- + -on]

negatron (ˈnɛɡəˌtrɒn)
an obsolete word for electron
[C20: from nega(tive + elec)tron]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

coined 1891, from electric.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

electron e·lec·tron (ĭ-lěk'trŏn')
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.

negatron neg·a·tron (něg'ə-trŏn')

  1. See electron.

  2. An electron with a negative charge, as contrasted with a positron.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
electron  [%PREMIUM_LINK%]     (ĭ-lěk'trŏn')  Pronunciation Key 
  1. 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.

  2. A positron or a negatron. See more at negatron.

negatron   (něg'ə-trŏn')  Pronunciation Key 
An electron with a negative charge; the antiparticle of the positron. Most branches of particle physics construe each particle along with its antiparticle to be two different forms of one underlying phenomenon, and the term electron is sometimes used as a precisely such a general term, with positron and negatron referring to the forms of the electron as they are manifested in nature. See more at electron.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
American Heritage
Cultural Dictionary
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.
Cite This Source
Related Words
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature