Ununtrium
noun, Chemistry, Physics.
1.
a superheavy, synthetic, radioactive element with a short half-life. Symbol: Uut; atomic number: 113.
noun
an unconfirmed synthetic chemical element with atomic number 113; also called eka-thallium
Word Origin
2004
ununtrium
(ə-nŭn’trē-əm)
See element 113.
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