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einsteinium

noun

ein·​stei·​ni·​um īn-ˈstī-nē-əm How to pronounce einsteinium (audio)
: a radioactive element produced artificially see Chemical Elements Table

Word History

Etymology

New Latin, from Albert Einstein

First Known Use

1955, in the meaning defined above

Time Traveler
The first known use of einsteinium was in 1955

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