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 hol·mi·um /ˈho(l)miəm/
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 hol·mi·um /ˈho(l)mɪəm/ 名詞
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 Hol·mi·um n.  Chem. 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. --HCP61 -- Hol*mic a.
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 holmium
      n : a trivalent metallic element of the rare earth group; occurs
          together with yttrium; forms highly magnetic compounds
          [syn: Ho, atomic number 67]

 holmium
 Symbol: Ho
 Atomic number: 67
 Atomic weight: 167.26
 Relatively soft and malleable silvery-white metallic element, which is stable
 in dry air at room temperature. It oxidizes in moist air and at high
 temperatures. It belongs to the lanthanoids. A rare-earth metal, it is found
 in the minerals monazite and gadolinite. It possesses unusual magnetic
 properties. One natural isotope, Ho-165 exists, six radioisotopes exist, the
 most stable being Ho-163 with a half-life of 4570 years. Holmium is used in
 some metal alloys, it is also said to stimulate the metabolism. Discovered by
 Per Theodor Cleve and J.L. Soret in Switzerland in 1879. The name homium comes
 from the Greek word Holmia which means Sweden. While all holmium compounds
 should be considered highly toxic, initial evidence seems to indicate that
 they do not pose much danger. The metal's dust however, is a fire hazard.