ozonosphere noun. [ǝʊ'zǝʊnǝsfɪǝ] M20.
[from OZONE + -O- + -SPHERE.]
The region of the upper atmosphere, at an altitude of 10 to 50 km (6 to 30 miles), containing significant amounts of ozone, which absorbs short ultraviolet light; esp. the region of maximum ozone concentration between 20 and 25 km (12 and 15 miles) up.

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