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

 

samarium

 noun
noun
BrE BrE//ˈmeəriəm//
 
; NAmE NAmE//ˈmeriəm//
 
[uncountable](symbol Sm)
 
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a chemical element. Samarium is a hard silver-white metal used in making strong magnets. Word Origin late 19th cent.: from samar(skite), a mineral in which its spectrum was first observed (named after Samarsky, a 19th-cent. Russian official) + -ium.
See the Oxford Advanced American Dictionary entry: samarium