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samarium

noun
/səˈmeəriəm/
/səˈmeriəm/
[uncountable]
(symbol Sm)
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  1. a chemical element. Samarium is a hard silver-white metal used in making strong magnets.
    Word Originlate 19th cent.: from samar(skite), a mineral in which its spectrum was first observed (named after Samarsky, a 19th-cent. Russian official) + -ium.
samarium
Chemical elements:actinium, alkali metal, americium...

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