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ozonosphere

/oʊˈzoʊnəˌsfɪr/
IPA guide

Definitions of ozonosphere
  1. noun
    a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
    synonyms: ozone layer
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    type of:
    layer
    a relatively thin sheetlike expanse or region lying over or under another
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