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Word: ozone
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Meaning:
Noun:
- chemistry An allotrope of oxygen (''symbol'' O3) having three atoms in the molecule instead of the usual two; it is a blue gas, generated from oxygen by electrical discharge; it is poisonous and highly reactive, but in the upper atmosphere it protects life on Earth from ultraviolet radiation.
- rfv-sense (''informally but erroneously'') Fresh air, especially that breathed at the seaside and smelling of seaweed.
Source: Wiktionary
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