ununseptium

Systematic element name, from un- +‎ un- +‎ sept- +‎ -ium.

• IPA^(key): /uːnuːnˈsɛpti.əm/

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• Hyphenation: un‧un‧sep‧ti‧um

ununseptium (uncountable)

2. (dated) The systematic element name for the chemical element with atomic number 117 (symbol Uus). The element is now named tennessine.
   • 2015 December 30, “Discovery and Assignment of Elements with Atomic Numbers 113, 115, 117 and 118”, in IUPAC‎^[1]:

     “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.

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ununseptium

1. tennessine

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ununseptium n (uncountable, no diminutive)

1. ununseptium

ununseptium (genitive ununseptiumi, partitive ununseptiumi or ununseptiumit)

1. ununseptium

Internationalism (see English ununseptium).

• IPA^(key): /ˈun.un.septium/, [ˈun.unˌs̠e̞pt̪ium]
• Rhymes: -eptium
• Syllabification^(key): un‧un‧sep‧ti‧um
• Hyphenation^(key): un‧un‧sep‧ti‧um

ununseptium (dated)

1. ununseptium

• (element 117): tennessiini

Derived from ūn(us) (“one”) + ūn(us) + sept(em) (“seven”) +‎ -ium (chemical element suffix), in reference to the element's atomic number (117).

• (Classical Latin) IPA^(key): [uː.nũːˈsɛp.ti.ũː]
• (modern Italianate Ecclesiastical) IPA^(key): [u.nunˈsɛp.t͡si.um]

ūnūnseptium n (genitive ūnūnseptiī); second declension

1. (New Latin) ununseptium

Second-declension noun (neuter).

• Italian: ununseptio

ununseptium n (genitive singular ununseptia, declension pattern of mesto)

1. ununseptium (element)