Unscramble

o 1 z 10 o 1 n 1 o 1 s 1 p 3 h 4 e 1 r 1 e 1 s 1

12 letters · 26 points in Scrabble

Meaning

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

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