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ozone layer is a noun meaning "a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun". It carries one recorded sense.
a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
Definitions, synonyms and semantic relations for ozone layer come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.