Definition of gadolinium noun from the Oxford Advanced Learner's Dictionary

 

gadolinium

 noun
noun
BrE BrE//ˌɡædəˈlɪniəm//
 
; NAmE NAmE//ˌɡædəˈlɪniəm//
 
[uncountable](symbol Gd)
 
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a chemical element. Gadolinium is a soft silver-white metal. Word Origin late 19th cent.: from gadolinite, named after Johan Gadolin (1760–1852), the Finnish mineralogist who first identified it.
See the Oxford Advanced American Dictionary entry: gadolinium