plutonium [plo͞o tō′nē əm ]
[ModL, after PLUTO (planet) + -IUM: so named (1942) by G. T. SEABORG Glenn T(heodore), E. M. MCMILLAN Edwin Mattison, A. C. Wahl (1917- ), & J. W. Kennedy (1916-57), U.S. physicists who isolated it (1940), because next to neptunium, as Pluto comes next to Neptune]
a radioactive, metallic chemical element, one of the actinides, found in trace quantities in native uranium ores and produced by bombarding uranium with deuterons: symbol, Pu; at. no., 94: its most important isotope (plutonium-239) is used in nuclear weapons and as a reactor fuel: see the periodic table of elements in the Reference Supplement

English World dictionary. . 2014.

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  • Plutonium — (pronEng|pluːˈtoʊniəm, symbol Pu, atomic number 94) is a rare radioactive, metallic chemical element. The most significant isotope of plutonium is 239Pu, with a half life of 24,100 years; this isotope is fissile and is used in most modern nuclear …   Wikipedia

  • Plutonium — Neptunium ← Plutonium → Américium Sm …   Wikipédia en Français

  • PLUTONIUM — Élément chimique artificiel de numéro atomique 94, le plutonium a pour symbole chimique Pu. Par analogie avec les éléments uranium et neptunium le précédant immédiatement dans la classification périodique, il doit son nom à la planète Pluton… …   Encyclopédie Universelle

  • Plutonium — Plutonium: Der Name des radioaktiven chemischen Elements wurde im 20. Jh. aus gleichbed. engl. plutonium übernommen, einer gelehrten Bildung des amerikanischen Chemikers G. Th. Seaborg und seiner Mitarbeiter zum Planetennamen Pluto. Der Name… …   Das Herkunftswörterbuch

  • plutonium — Symbol: Pu Atomic number: 94 Atomic weight: (242) Dense silvery radioactive metallic transuranic element, belongs to the actinoids. Pu 244 is the most stable isotope with a half life of 7.6*10^7 years. Thirteen isotopes are known. Pu 239 is the… …   Elements of periodic system

  • plutonium — (n.) 1942, from PLUTO (Cf. Pluto), the planet, + element ending ium. Discovered at University of California, Berkeley, in 1941, the element named on suggestion of Seaborg and Wahl because it follows NEPTUNIUM (Cf. neptunium) in the periodic table …   Etymology dictionary

  • Plutonĭum [1] — Plutonĭum, eine Höhle am Avernersee in Campanien,[220] welche als der Eingang zum Reiche Plutons betrachtet wurde. Auch in Magnesia, Myus, Thymbria u. Acharaka waren Plutonien …   Pierer's Universal-Lexikon

  • Plutonĭum [2] — Plutonĭum (Min.), so v.w. Baryum …   Pierer's Universal-Lexikon

  • Plutonium — (Рu) Плутоний искусственно полученный химический радиоактивный элемент (металл) с атомным номером 94. В природе встречается в ничтожных количествах в урановых рудах. Известны 16 изотопов плутония. Термины атомной энергетики. Концерн Росэнергоатом …   Термины атомной энергетики

  • PLUTONIUM — locus Phrygiae magnae, apud Hierapolim, ubi spiracula Ditis, Strab …   Hofmann J. Lexicon universale

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