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Dysprosium
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English Dictionary: dysprosium by the DICT Development Group
3 results for dysprosium
From WordNet (r) 3.0 (2006) [wn]:
dysprosium
n
  1. a trivalent metallic element of the rare earth group; forms compounds that are highly magnetic
    Synonym(s): dysprosium, Dy, atomic number 66
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Dysprosium \Dys*pro"si*um\, n. [NL., fr. Gr. dyspro`sitos hard
      to get at.] (Chem.)
      An element of the rare earth-group. Symbol Dy; at. wt.,
      162.5.

From The Elements (22Oct97) [elements]:
   dysprosium
   Symbol: Dy
   Atomic number: 66
   Atomic weight: 162.50
   Metallic with a bright silvery-white lustre. Dysprosium belongs to the
   lanthanoids. It is relatively stable in air at room temperatures, it will
   however dissolve in mineral acids, evolving hydrogen. It is found in
   from rare-earth minerals. There are seven natural isotopes of dysprosium,
   and eight radioisotopes, Dy-154 being the most stable with a half-life of
   3*10^6 years. Dysprosium is used as a neutron absorber in nuclear fission
   reactions, and in compact disks. It was discovered by Paul Emile Lecoq de
   Boisbaudran in 1886 in France. Its name comes from the Greek word
   dysprositos, which means hard to obtain.
  
  
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