ozone /ōˈzōn/

1. An allotropic form (O₃) of oxygen present in the atmosphere, once regarded as health-giving, but toxic in concentrations such as may occur in industrial areas, having a pungent smell, formed when ultraviolet light or an electric spark acts on oxygen or air, and used in bleaching, sterilizing water, and purifying air
2. Loosely, fresh bracing air
3. (see also ozonosphere below)

ozonāˈtion noun

Ozonization

ozonic /ō-zonˈik/ adjective

ozonide /ō-zōnˈīd/ noun

An oily explosive organic compound, formed when ozone reacts with unsaturated molecules

ozonifˈerous adjective

Bringing or producing ozone

ozonizāˈtion or ozonisāˈtion noun

ōˈzonize or ōˈzonise transitive verb

To turn into, charge with or treat with ozone

ozoniz'er or ozonis'er noun

An apparatus for turning oxygen into ozone

ozonˈosphere or ozone layer noun

A layer of the upper atmosphere where ozone is formed in quantity, protecting the earth from the sun's ultraviolet rays

ōˈzone-depleter noun

Something that causes ozone depletion

ōˈzone-depleting adjective

ozone depletion noun

Damage to the ozone layer caused by compounds such as chlorofluorocarbons (CFCs)

ozone-friendˈly adjective

(of certain aerosols, etc) not thought to be destructive of the ozone layer, being free of chlorofluorocarbons

ozone hole noun

A hole in the ozone layer, which allows ultraviolet rays into the earth's atmosphere

ozone layer see ozonosphere above.

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