Stratosphere
WordNet
noun
(1) The atmospheric layer between the troposphere and the mesosphere
WiktionaryText
Noun
- The region of the uppermost atmosphere where temperature increases along with the altitude due to the absorption of solar UV radiation by ozone. The stratosphere extends from the tropopause (10-15 kilometers) to approximately 50 kilometers.
- layer of the earth's atmosphere located above the troposphere and below the mesosphere.