Longman Dictionary of Contemporary English homepage

Topic: NATURE

Date: 1800-1900
Language: German
Origin: ozon, from Greek, from ozein 'to smell'

ozone

 noun
     
o‧zone [uncountable]
1 technicalHCSGE a poisonous blue gas that is a type of oxygen
2 informalDN air near the sea, thought to be fresher and healthier
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