An element of the lanthanide group, atomic no. 64, atomic wt. 157.25. The paramagnetic properties of this element are used in contrast media for magnetic resonance imaging. [mineral, gadolinite, from Johan Gadolin, Finnish chemist, 1760–1852]
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gad·o·lin·i·um .gad-əl-'in-ē-əm n a magnetic metallic element of the rare-earth group symbol Gd see ELEMENT (table)
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gad·o·lin·i·um (Gd) (gad″o-linґe-əm) a rare element of atomic number 64, atomic weight 157.25; chelated gadolinium is used as a paramagnetic contrast medium in magnetic resonance imaging.Medical dictionary. 2011.