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nihonium

[ nee-haw-nee-uhm ]
/ niˈhɔ ni əm /
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noun Chemistry, Physics.
a superheavy, synthetic, radioactive element with a short half-life. Symbol:Nh;atomic number: 113.
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Formerly un·un·tri·um [uh-nuhn-tree-uhm], /əˈnʌn tri əm/, element 113 .

Origin of nihonium

Named in 2016 ; after Nihon + -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
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