Gadolinium

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Gadolinium \Gad`o*lin"i*um\, n. [NL. See {Gadolinite}.] (Chem.)
     A rare earth metallic element of the Lanthanide series, with
     a characteristic spectrum, found associated with yttrium and
     other rare earth elements. Symbol, Gd; it has an atomic
     number of 64, an atomic weight of 157.25 (C=12.011), and a
     valence of +3.


     [1913 Webster +PJC]

From WordNet (r) 2.0 [wn]:

  gadolinium
       n : a ductile silvery-white ductile ferromagnetic trivalent
           metallic element of the rare earth group [syn: {Gd}, {atomic
           number 64}]

From Elements database 20001107 [elements]:

  gadolinium
  Symbol: Gd
  Atomic number: 64
  Atomic weight: 157.25
  Soft silvery metallic element belonging to the lanthanoids. Seven natural,
  stable isotopes are known in addition to eleven artificial isotopes.
  Gd-155 and Gd-157 and the best neutron absorbers of all elements.
  Gadolinium compounds are used in electronics. Discovered by J.C.G Marignac
  in 1880.