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berkelium

noun

berke·​li·​um ˈbər-klē-əm How to pronounce berkelium (audio)
: a radioactive metallic element produced artificially (as by bombarding americium 241 with alpha particles) see Chemical Elements Table

Word History

Etymology

New Latin, from Berkeley, California

First Known Use

1950, in the meaning defined above

Time Traveler
The first known use of berkelium was in 1950

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