Holmium

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The American Heritage® Dictionary of the English Language, 4th Edition
  • n. A relatively soft, malleable, stable rare-earth element occurring in gadolinite, monazite, and other rare-earth minerals. Atomic number 67; atomic weight 164.930; melting point 1,461°C; boiling point 2,600°C; specific gravity 8.803; valence 3. See Table at element.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. A metallic chemical element (symbol Ho) with an atomic number of 67.
  • the GNU version of the Collaborative International Dictionary of English
  • n. A rare element of atomic number 67 said to be contained in gadolinite. Chemical symbol Ho. Atomic weight 164.93. Valence +3. It was detected by spectral absorption bands in 1878 by the Delafontaine and Soret, who called it "Element X". Later the Swedish chemist Cleve independently discovered it in erbia, and named it after his native city Stockholm. The first preparation of pure Holmia, the yellow oxide, was not made until 1911.
  • The Century Dictionary and Cyclopedia
  • n. Chemical symbol, Ho. A certain substance whose chemical properties have not been investigated, but which is assumed to be an elementary substance.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • n. a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds
  • Hypernym
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    Same Context
    Words that are found in similar contexts
    terbium    thulium    gadolinium