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electrum

Translation
electrum
Electron E*lec"tron, n. [NL., fr. Gr. 'h`lektron. See {Electric}.] 1. Amber; also, the alloy of gold and silver, called {electrum}. [archaic] [1913 Webster]

2. (Physics & Chem.) one of the fundamental subatomic particles, having a negative charge and about one thousandth the mass of a hydrogen atom. The electron carries (or is) a natural unit of negative electricity, equal to 3.4 x 10^{-10} electrostatic units, and is classed by physicists as a {lepton}. Its mass is practically constant at the lesser speeds, but increases due to relativistic effects as the velocity approaches that of light. Electrons are all of one kind, so far as is known. Thus far, no structure has been detected within an electron, and it is probably one of the ultimate composite constituents of all matter. An atom or group of atoms from which an electron has been detached has a positive charge and is called a {cation}. Electrons are projected from the cathode of vacuum tubes (including television picture tubes) as {cathode rays} and from radioactive substances as the {beta rays}. Previously also referred to as {corpuscle}, an obsolete term. The motion of electrons through metallic conductors is observed as an electric current. A particle identical to the electron in mass and most other respects, but having a positive instead of a negative charge, is called a {positron}, or {antielectron} [Webster 1913 Suppl. +PJC]


The Collaborative International Dictionary of English. 2000.

  
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  • Electrum — Saltar a navegación, búsqueda La palabra Electrum tuvo dos significados en la antigüedad: Una aleación de oro y plata, en proporción aproximada de 4:1, similar al actual oro blanco. El ámbar, conocido por los griegos desde la época homérica.… …   Wikipedia Español

  • electrum — 1> мин. природное золото с большим содержанием серебра 2> электрон, сплав золота и серебра 3> сплав меди, цинка, никеля 4> уст. янтарь …   Новый большой англо-русский словарь

  • Electrum — (lat.), 1) Bernstein; 2) Metall, aus 4/5 Gold u. 1/5 Silber bestehend; jetzt 3) Metall, enthält gediegen Gold (64) u. Silber (36); kommt in würfeligen Krystallen zackig u. in Blättchen vor; hat messinggelbe Farbe, findet sich in Sibirien,… …   Pierer's Universal-Lexikon

  • Electrum — Electrum, s. Elektrum …   Meyers Großes Konversations-Lexikon

  • Electrum — NOTOC Electrum is a naturally occurring alloy of gold and silver, with trace amounts of copper and other metals. Colour ranges from pale to bright yellow, depending on the proportions of gold and silver. Gold content of naturally occurring… …   Wikipedia

  • electrum — Das electrum Das Museum der Elektrizität in Hamburg ist ein Museum, das sich mit der Geschichte der Elektrizität und der Anwendung elektrischen Stroms insbesondere seit Beginn der Elektrifizierung bis in die jüngere Vergangenheit befasst.… …   Deutsch Wikipedia

  • Electrum — Das electrum Museum für Elektrizität war ein bis Ende 2001 von den Hamburgischen Electricitäts Werken betriebenes Museum im Hamburger Stadtteil Barmbek Süd. Inhaltsverzeichnis 1 Exponate und Ausstellungen 1.1 Ausstellende Künstler (Auswahl) 2… …   Deutsch Wikipedia

  • electrum — /i lek treuhm/, n. 1. an amber colored alloy of gold and silver used in ancient times. 2. an alloy composed of about 50 percent copper, 30 percent nickel, and 20 percent zinc. 3. German silver; nickel silver. [1350 1400; ME < L < Gk élektron… …   Universalium

  • electrum — noun /ɪˈlɛktɹəm/ a) An alloy of gold and silver, used by the ancients; now specifically a natural alloy with between 20 and 50 per cent silver. Native gold almost always contains silver in amounts varying widely between 5 and 50 per cent.… …   Wiktionary

  • electrum — (минералогия) природное золото с большим содержанием серебра электрон, сплав золота и серебра сплав меди, цинка, никеля (устаревшее) янтарь …   Большой англо-русский и русско-английский словарь