ozone
ozone BrE [ˈəʊzəʊn] NAmE [ˈoʊzoʊn] noun uncountable
1. (chemistry)a poisonous gas with a strong smell that is a form of ↑oxygen
2. (BrE, informal)air near the sea that smells fresh and pure
Word Origin:
[ozone] mid 19th cent.: from German Ozon, from Greek ozein ‘to smell’.
Example Bank:
•Ozone is formed when an electric spark is passed through oxygen.
•The ozone layer is disappearing over northern Europe.
•the discovery of massive springtime reductions in ozone over Antarctica
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