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hassium

noun

has·​si·​um ˈha-sē-əm How to pronounce hassium (audio)
: a short-lived radioactive metallic element produced artificially see Chemical Elements Table

Word History

Etymology

New Latin, from Hassia Hesse (German state), location of the laboratory that first produced the element

First Known Use

1992, in the meaning defined above

Time Traveler
The first known use of hassium was in 1992

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