plutonium

plu·to·ni·um  (pl-tn-m)

n. Symbol Pu

A naturally radioactive, silvery, metallic transuranic element, occurring in uranium ores and produced artificially by neutron bombardment of uranium. Its longest-lived isotope is Pu 244 with a half-life of 76 million years. It is a radiological poison, specifically absorbed by bone marrow, and is used, especially the highly fissionable isotope Pu 239, as a reactor fuel and in nuclear weapons. Atomic number 94; melting point 640°C; boiling point 3,235°C; specific gravity 19.84; valence 3, 4, 5, 6. See Table at element.

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[After the planet Pluto (from the fact that it follows neptunium in the periodic table).]

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plutonium

Noun

Chem a toxic radioactive metallic element, used in nuclear reactors and weapons Symbol: Pu[after Pluto, because Pluto lies beyond Neptune and plutonium was discovered soon after neptunium]

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plutonium  (pl-tn-m)

Symbol Pu

A silvery, radioactive metallic element of the actinide series that has the highest atomic number of all naturally occurring elements. It is found in minute amounts in uranium ores and is produced artificially by bombarding uranium with neutrons. It is absorbed by bone marrow and is highly poisonous. Plutonium is used in nuclear weapons and as a fuel in nuclear reactors. Its longest-lived isotope is Pu 244 with a half-life of 76 million years. Atomic number 94; melting point 640°C; boiling point 3,232°C; specific gravity 19.84; valence 3, 4, 5, 6. See Periodic Table.

Thesaurus

Noun

1.

plutonium - a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239 atomic number 94, Pu chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter plutonium 239 - a highly fissionable isotope of plutonium that is used in atomic weapons and as a reactor fuel; produced by irradiating uranium 238 with slow electrons

Translations

plutonium [pluːˈtəunɪəm] n → plutonio

plutonium [pluːˈtəunɪəm] n → Plutonium nt

plutonium [pluːˈtəunɪəm] n → plutonio

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plutonium

n plutonium [pluːˈtəuniəm]

a radioactive element used in many nuclear processes. plutonium عُنْصُر إشْعاعي плутоний plutonium plutonium das Plutonium πλουτώνιο plutonio plutoonium پلوتونیم plutonium plutonium פְּלוּטוֹניוּם एक रेडियोधर्मी तत्व plutonij plutónium plutonium plútóníum plutonio プルトニウム 플루토늄(방사성 원소의 하나) plutonis plutonijs plutonium plutonium plutonium pluton plutónio plu­toniu плутоний plutónium plutonij plutonijum plutonium ธาตุกัมตภาพรังสีชนิดหนึ่ง plütonyum 鈽 плутоній پلوٹونيم، ايک شعاع ريز مادہ pluton 钚