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oganesson

/oʊɡəˈnɛsɒn/

oganesson noun: the chemical element (symbol Og) with atomic number 118. It is the heaviest known element. Highly radioactive, it does not occur naturally. Originally expected to be a noble gas, it is now predicted to be a reactive metallic solid, and a semiconductor or a post-transition metal.

oganesson: the chemical element (symbol Og) with atomic number 118. It is the heaviest known element. Highly...
Image: Kwamikagami, CC BY-SA 4.0, via Wikimedia Commons

Noun

oganesson (uncountable)

  1. The chemical element (symbol Og) with atomic number 118. It is the heaviest known element. Highly radioactive, it does not occur naturally. Originally expected to be a noble gas, it is now predicted to be a reactive metallic solid, and a semiconductor or a post-transition metal.
    • SINGAPORE - The four new elements announced in December last year have received their new names: Nihonium (Nh), moscouvium (Mc), tennessine (Ts) and oganesson (Og).2016 June 9, “Meet the periodic table's 4 new elements: Nihonium, moscouvium, tennessine and oganesson”, in The Straits Times
    • In January 2016 the International Union of Pure and Applied Chemistry (IUPAC) announced the discovery of four new elements, so completing the seventh row of the periodic table. They have since been named as nihonium, Nh, muscovium^([sic]), Mc, tennessine, Ts, and organesson^([sic]), Og. The...2018, Mark Weller, Tina Overton, Fraser Armstrong, Jonathan Rourke, chapter 1, in Inorganic Chemistry, Oxford University Press, →ISBN, page 21
    1. (countable) An atom of this element.

oganesson meaning in Arabic and Vietnamese

oganesson in Arabic

chemical element
أُوغَانِيسُون ʔūḡānīsūn

oganesson in Vietnamese

chemical element
oganesson

Synonyms of oganesson

Origin of oganesson

From Oganessian + -on. Promulgated in June 2016 by IUPAC based on recommendations of the Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory to honor Russian-Armenian physicist Yuri Oganessian (born 1933) who researched superheavy elements. Suffix -on, rather than -ium, is because it is a noble gas (like neon or argon).

Words formed from oganesson

Questions about oganesson

What does oganesson mean?
Oganesson means the chemical element (symbol Og) with atomic number 118. It is the heaviest known element. Highly radioactive, it does not occur naturally. Originally expected to be a noble gas, it is now predicted to be a reactive metallic solid, and a semiconductor or a post-transition metal.
What is oganesson in Arabic?
Oganesson in Arabic is أُوغَانِيسُون (ʔūḡānīsūn). See Oganesson meaning in Arabic.
What part of speech is oganesson?
Oganesson is a noun.
How do you pronounce oganesson?
Oganesson is pronounced /oʊɡəˈnɛsɒn/.

Words near oganesson in the dictionary

  1. ogam
  2. ogamic
  3. ogams
  4. Oganessian
  5. oganessium
  6. oganesson
  7. oganesson tetratennesside
  8. ogas
  9. Ogasawara
  10. Ogases
  11. Ogata

Source and license

Adapted from Wiktionary: oganesson (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Wodencafe-oganesson.wav.

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