Usually means: Heaviest element, formerly named ununoctium.
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We found 4 dictionaries that define the word ununoctium:

General (2 matching dictionaries)
  1. ununoctium: Wiktionary
  2. Ununoctium: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)
  1. ununoctium: Encyclopedia

Science (1 matching dictionary)
  1. ununoctium: WebElements Periodic Table of the Elements

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Definitions from Wiktionary (ununoctium)

▸ noun:  (dated) The systematic element name for the chemical element with atomic number 118 (symbol Uuo); now named oganesson.

Similar:
unbioctium, ununennium, unbibium, ununhexium, unbinilium, ununpentium, untribium, unbihexium, untriseptium, untrihexium, more...

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Similar:
unbioctium, ununennium, unbibium, ununhexium, unbinilium, ununpentium, untribium, unbihexium, untriseptium, untrihexium, more...



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