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  1. ozone layer

    • IPA[ˈōˌzōn ˈlāər]

    美式

    • n.
      a layer in the earth's stratosphere at an altitude of about 6.2 miles (10 km) containing a high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth from the sun.
    • noun: ozone layer

    • 更多解釋

    英式

    • n.
      a layer in the earth's stratosphere at an altitude of about 10 km (6.2 miles) containing a ...

    Oxford Dictionary