Meaning & use
ozone
A form of oxygen with three atoms per molecule that forms a protective layer in the upper atmosphere.
See it in a sentence
Scientists monitor the hole in the ozone layer above Antarctica every year.
The seaside air had that sharp, fresh smell people often call ozone.
A note on using this word
At ground level ozone is a harmful pollutant, while in the upper atmosphere it protects Earth from ultraviolet radiation.
Words with a similar meaning
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