u·ra·ni·um
(yo͝o-rā′nē-əm)n. Symbol U
A dense silvery-white metallic element that is radioactive and toxic, is easily oxidized, and has numerous isotopes of which U-238 is the most abundant in nature. The element occurs in several minerals, including uraninite and carnotite, from which it is extracted and processed for use in research, nuclear fuels, and nuclear weapons. Atomic number 92; atomic weight 238.03; melting point 1,135°C; boiling point 4,131°C; specific gravity 19.1; valence 2, 3, 4, 5, 6. See Periodic Table.
[New Latin ūranium, named by German chemist Martin Heinrich Klaproth, who discovered the element in 1789, after New Latin Ūranus, the planet Uranus, discovered in 1781; see Uranus.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
uranium
(jʊˈreɪnɪəm)n
(Elements & Compounds) a radioactive silvery-white metallic element of the actinide series. It occurs in several minerals including pitchblende, carnotite, and autunite and is used chiefly as a source of nuclear energy by fission of the radioisotope uranium-235. Symbol: U; atomic no: 92; atomic wt: 238.0289; half-life of most stable isotope, 238U: 451 × 109 years; valency: 2-6; relative density: 18.95 (approx.); melting pt: 1135°C; boiling pt: 4134°C
[C18: from New Latin, from Uranus2; from the fact that the element was discovered soon after the planet]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
u•ra•ni•um
(yʊˈreɪ ni əm)n.
a white, lustrous, radioactive, metallic element, isotopes of which are used in atomic and hydrogen bombs and as a fuel in nuclear reactors. Symbol: U; at. wt.: 238.03; at. no.: 92; sp. gr.: 19.07.
[< German (1790), after the planet Uranus]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
u·ra·ni·um
(yo͝o-rā′nē-əm) Symbol U A heavy, silvery-white, highly toxic, radioactive metallic element of the actinide series. It occurs in several minerals and ores, such as pitchblende. Uranium is used as a fuel for nuclear reactors to generate electricity. Atomic number 92. See Periodic Table.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
uranium
A highly radioactive element used in thermonuclear reactors.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
| Noun | 1. |  uranium - a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weaponsmetal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. uranium 235 - a uranium isotope with mass number 235; capable of sustaining chain reactions uranium 238 - the commonest isotope of uranium; it is not fissionable but when irradiated with neutrons it produces fissionable plutonium 239 pitchblende, uraninite - a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore |
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
يورانيوميُورانِيُوم
уран
uran
uran
uranio
uraan
uraani
uranuranij
urán
úranúraníum, úran
ウラニウムウラン
우라늄
uranium
uranas
urāns
uraniumuraan
uraniu
uranurán
uran
uran
ธาตุยูเรเนียม
уран
uranuraniuranium
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
uranium
n → Uran nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
uranium
(juˈreiniəm) noun a radioactive element.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
uranium
→ يُورانِيُوم uran uran Uran ουράνιο uranio uraani uranium uran uranio ウラニウム 우라늄 uranium uran uran urânio уран uran ธาตุยูเรเนียม uranyum uranium 铀Multilingual Translator © HarperCollins Publishers 2009
uranium
n uranioEnglish-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.