from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A silvery-white, soft, rare-earth element occurring in monazite and bastnaesite and used to dope lasers and to absorb neutrons in 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 Table at element.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a metallic chemical element (symbol Eu) with an atomic number of 63.

from the GNU version of the Collaborative International Dictionary of English

  • n. A metallic element of the rare-earth group (Lanthanide series), discovered spectroscopically by Demarcay in 1896. Symbol, Eu; atomic number 63; at. wt., 151.965 (C=12.011); valence = +2 or +3.

from The Century Dictionary and Cyclopedia

  • n. A supposed new element announced by Demarçay in 1901, obtained in very small quantity as oxid, sulphate, etc., from samar-skite and monazite.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a bivalent and trivalent metallic element of the rare earth group


After Europe .
(American Heritage® Dictionary of the English Language, Fourth Edition)
After the continent of Europe + -ium. (Wiktionary)


  • Now rare earth elements with exotic names such as europium and tantalum hold the key to hybrid cars, wind turbines and crystal-clear

  • Now rare earth elements with exotic names such as europium and tantalum hold the key to hybrid cars, wind turbines and crystal-clear TV displays - that is, if a looming supply shortage doesn't stop innovation in its tracks.

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  • Rare-earth phosphors such as europium and yttrium are in demand to tweak the color of compact fluorescent light bulbs and LED displays.

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  • The insides of energy-efficient compact fluorescent light bulbs are coated with tiny amounts of two such elements, terbium and europium.

    U.S. urged to safeguard supply of 'energy-critical elements'

  • The mine—perched 4,800 miles above sea level—had its heyday three decades ago, sometimes producing metals such as europium, which provided the red color for color television sets at the time.

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  • Magnets made with neodymium power cellphones and wind turbines, cerium is used to polish flat-screen monitors, and europium puts the red in cockpit displays and televisions.

    Highfliers Find Lower Orbit

  • The drops haven't been across the board, and europium and ytterbium prices remain high, he said.

    Highfliers Find Lower Orbit

  • James S. Schilling, Ph. D., professor of physics in Arts & Sciences at Washington University in St. Louis, and Mathew Debessai — his doctoral student at the time — discovered that europium becomes superconducting at 1.8 K (-456 °F) and 80 GPa (790,000 atmospheres) of pressure, making it the 53rd known elemental superconductor and the 23rd at high pressure.

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  • Everything from fluorescent light bulbs to laptop and iPhone screens relies on small but critical amounts of europium to generate a pleasant red color and terbium to make green.

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  • In the 1960s, the pit grew deeper as demand increased for the rare-earth element europium, which was used to create the red tones in color TVs.

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