Ununoctium
noun ·Rare ·Advanced level
Definitions
- 1 The systematic element name for the chemical element with atomic number 118 (symbol Uuo); now named oganesson. dated, uncountable
"“The chemistry community is eager to see its most cherished table finally being completed down to the seventh row. IUPAC has now initiated the process of formalizing names and symbols for these elements temporarily named as ununtrium, (Uut or element 113), ununpentium (Uup, element 115), ununseptium (Uus, element 117), and ununoctium (Uuo, element 118)” said Professor Jan Reedijk, President of the Inorganic Chemistry Division of IUPAC."
Example
More examples"“The chemistry community is eager to see its most cherished table finally being completed down to the seventh row. IUPAC has now initiated the process of formalizing names and symbols for these elements temporarily named as ununtrium, (Uut or element 113), ununpentium (Uup, element 115), ununseptium (Uus, element 117), and ununoctium (Uuo, element 118)” said Professor Jan Reedijk, President of the Inorganic Chemistry Division of IUPAC."
Etymology
Systematic element name, from un- + un- + oct- + -ium.
Related phrases
More for "ununoctium"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.