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oganesson

[ oh-gan-uh-suhn ]
/ oʊˈgæn ə sən /
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noun Chemistry, Physics.
a superheavy, synthetic, radioactive element with a short half-life. Symbol: Og; atomic number: 118.
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Formerly un·un·oc·ti·um [uhn-uh-nok-tee-uhm], /ˌʌn əˈnɒk ti əm/, element 118 .

Origin of oganesson

Named in 2016; after Yuri Tsolakovich Oganessian (born 1933), Russian nuclear physicist of Armenian descent + -on2

Words nearby oganesson

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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