[yoo-roh-pee-uh m, yuh-]
- a rare-earth metallic element whose salts are light pink. Symbol: Eu; atomic weight: 151.96; atomic number: 63.
Origin of europium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a 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
C20: 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
Word Origin and History for europium
rare earth element, 1901, named by its discoverer, French chemist Eugène Demarçay (1852-1903) in 1896, from Europe + -ium.
Online Etymology Dictionary, © 2010 Douglas Harper
- A 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.
- A 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.