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See also: ozoné


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From German Ozon, coined 1840 by Christian Friedrich Schönbein, from Ancient Greek ὄζον (ózon), neuter participle of ὄζω (ózō, I smell), in reference to its pungent odour.

The “fresh air” sense is from an erroneous former belief that seaweed contains and releases ozone.


  • IPA(key): /ˈoʊzoʊn/, /ˈəʊzəʊn/
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ozone (uncountable)

  1. (inorganic chemistry) An allotrope of oxygen (symbol O₃) having three atoms in the molecule instead of the usual two; it is a toxic gas, generated from oxygen by electrical discharge.
    • 2018, Nnedi Okorafor, Who Fears Death, HarperVoyager, page 334:
      Lightning flashed again, the thunder came a second later. It rained harder. The smell of ozone was strong. You could feel the charge in the air.
    Hypernym: greenhouse gas
  2. (Britain, informal) Fresh air, especially that breathed at the seaside and smelling of seaweed.
    • 1875, William Crookes, The Chemical News, page 99,
      A patent obtained in England, and specified far from clearly, for obtaining ozone by boiling seaweed,†† may be mentioned as a curiosity, and also the credulity with which ozone-baths, prepared in this manner, find a ready sale, in spite of, or perhaps rather on account of, their high price.
    • 1888, L. T. Meade, A. Balfour Symington, Edwin Oliver, Atalanta, Volume 1, page 674,
      To Ramsgate baths she sped, in quest / Of seaweed and ozone ; / For seaweed and ozone were best, / They said, to give her tone.
    • 2007, Robert Douglas, Tales of the Unexpected, Somewhere to Lay My Head, unnumbered page,
      It's got the lot: fresh sea air, ozone, seaweed. You could cut the air with a knife.

Derived terms[edit]



ozone (third-person singular simple present ozones, present participle ozoning, simple past and past participle ozoned)

  1. (transitive) To treat with ozone.
    • 1868, Medical and Surgical Reporter (volume 19, page 392)
      Whenever it exists, as it usually does, even where the tide water freshens at the ebb, it seems to have a purifying tendency, probably by ozoning the superincumbent atmosphere.
    • 1997, Robert Sampson, Patricia Hughes, Breaking Out of Environmental Illness
      I worked nonstop to make the house safe. Periodically I ozoned the first-floor bathroom, but it still made us sick.

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  • IPA(key): /ɔ.zɔn/, /ɔ.zon/, /o.zon/
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ozone m (plural ozones)

  1. ozone (O3)

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