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electromotive drug administration
electromotive force
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Electron definitions

Webster's 1828 Dictionary

ELEC'TRON, n. Amber; also, a mixture of gold with a fifth part of silver.

WordNet (r) 3.0 (2005)

1: an elementary particle with negative charge [syn: electron, negatron]

Merriam Webster's

noun Etymology: electr- + 2-on Date: 1891 an elementary particle consisting of a charge of negative electricity equal to about 1.602 10-19 coulomb and having a mass when at rest of about 9.109 10-31 kilogram or about 1/1836 that of a proton

Oxford Reference Dictionary

n. a stable elementary particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids. Phrases and idioms: electron beam a stream of electrons in a gas or vacuum. electron diffraction the diffraction of a beam of electrons by atoms or molecules, used for determining crystal structures etc. electron gun a device for producing a narrow stream of electrons from a heated cathode. electron lens a device for focusing a stream of electrons by means of electric or magnetic fields. electron microscope a microscope with high magnification and resolution, employing electron beams in place of light and using electron lenses. electron pair an electron and a positron. electron spin resonance a spectroscopic method of locating electrons within the molecules of a paramagnetic substance. Usage: Abbr.: ESR. Etymology: ELECTRIC + -ON

Webster's 1913 Dictionary

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 1913 Dictionary

Electron E*lec"tron, n. [NL., fr. Gr. 'h`lektron. See Electric.] Amber; also, the alloy of gold and silver, called electrum.

Collin's Cobuild Dictionary

(electrons) An electron is a tiny particle of matter that is smaller than an atom and has a negative electrical charge. (TECHNICAL) N-COUNT

Moby Thesaurus

Kern, NMR, alpha particle, antibaryon, antilepton, antimeson, atom, atomic nucleus, atomic particle, baryon, beta particle, cathode particle, electron affinity, electron cloud, electron pair, electron shells, electron spin, electron transfer, electron-positron pair, elementary particle, energy level, excited state, extranuclear electrons, ground state, ion, lepton, lone pair, meson, molecule, monad, negatron, neutron, nuclear force, nuclear magnetic resonance, nuclear particle, nuclear resonance, nucleon, nucleosynthesis, nucleus, octet, orbital electron, photoelectron, photon, proton, quark, recoil electron, secondary electron, shared pair, strangeness, strong interaction, subvalent electrons, surface-bound electron, thermion, triton, valence electron, valence electrons, valence shell, wandering electron


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