| 单词 | europium |
| 释义 | europium[ yoo-roh-pee-uhm, yuh- ] / yʊˈroʊ pi əm, yə- / noun Chemistry.a rare-earth metallic element whose salts are light pink. Symbol: Eu; atomic weight: 151.96; atomic number: 63. Origin of europiumFirst recorded in 1900–05; Europe + -ium Words nearby europiumEuropean wasp, Europhile, Europhilia, Europhobia, Europhobic, europium, Europocentric, Europol, Europoort, Eurosceptic, Eurostat Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for europiumeuropium / (jʊˈrəʊpɪəm) / nouna soft ductile reactive silvery-white element of the lanthanide series of metals: used as the red phosphor in colour television and in lasers. Symbol: Eu; atomic no: 63; atomic wt: 151.965; valency: 2 or 3; relative density: 5.244; melting pt: 822°C; boiling pt: 1527°C Word Origin for europiumC20: named after Europe + -ium Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for europiumeuropium [ yu-rō′pē-əm ] n. Symbol EuA rare-earth element used as a neutron absorber in nuclear research. Atomic number 63. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for europiumeuropium [ yu-rō′pē-əm ] EuA very rare, silvery-white metallic element that is the softest member of the lanthanide series. It is used in making color television tubes and lasers and as a neutron absorber in nuclear research. Atomic number 63; atomic weight 151.96; melting point 826°C; boiling point 1,439°C; specific gravity 5.259; valence 2, 3. See Periodic Table. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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