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.
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