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Definition of: stratosphere
(strat′ə·sfir, strā′tə-) noun Meteorol.
The portion of the atmosphere lying above the troposphere and beginning at a height of about six miles. In it the systematic fall of temperature with increasing altitude, characteristic of the region below it, ceases, often giving place to a more or less uniform temperature.
—strat′o·spher′ic (-sfer′ik) adjective
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