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1. (n.) ozone layer
the layer of the upper atmosphere where most atmospheric ozone is concentrated, from about 8 to 30 mi. (12 to 48 km) above the earth.
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Princeton's WordNet |
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1. (noun) ozone layer, ozonosphere
a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
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1. (noun) ozone layer
the ozone layer
a layer of gases around the earth that protects it from the sun's heat
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Definitions of ozone layer 
