gadolinium Meaning, Definition & Usage

  1. noun a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group
    Gd; atomic number 64.

WordNet

Gad`o*lin"i*um noun
Etymology
NL. See Gadolinite.
Definitions
  1. (Chem.) A supposed rare metallic element, with a characteristic spectrum, found associated with yttrium and other rare metals. Its individuality and properties have not yet been determined.

Webster 1913