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ozone Definition
ozonenoun 1. chem.(formula O3) a toxic pungent unstable bluish gas that is an allotrope of oxygen, and at ground level may be a pollutant (photochemical smog). Ozone is formed when ultraviolet light or an electric spark acts on oxygen, and is a strong oxidizing agent, used in controlled quantities for bleaching, sterilizing water and purifying air, etc.
2. colloq
Etymology: 19c: from Greek
ozein to smell.