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ozonosphere

n.
1.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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  • ozokerite
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  • ozocerite
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  • ozothamnus secundiflorus
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    Idiom of the Day

    give (someone) a clean bill of health
    to declare that someone is healthy (usually done by a doctor)
    My doctor gave me a clean bill of health during my recent checkup.



    1.
    As poor as they are (a) / they never refuse to donate, they have (b) / for any noble cause. (c) No error (d)

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