noun \ˈstra-tə-ˌsfir\

Definition of STRATOSPHERE

:  the part of the earth's atmosphere which extends from the top of the troposphere to about 30 miles (50 kilometers) above the surface and in which temperature increases gradually to about 32° F (0° C) and clouds rarely form
:  a very high or the highest region on or as if on a graded scale <construction costs in the stratosphere> <the celebrity stratosphere>
strato·spher·ic \ˌstra-tə-ˈsfir-ik, -ˈsfer-\ adjective
strato·spher·i·cal·ly \-i-k(ə-)lē\ adverb


French stratosphère, from New Latin stratum + -o- + French sphère sphere, from Latin sphaera
First Known Use: 1909


noun    (Concise Encyclopedia)

Layer of the atmosphere that is located above the troposphere. The stratosphere extends from a lower boundary of about 11 mi (17 km) altitude to an upper boundary (the stratopause) at about 30 mi (50 km). The ozone layer is a part of the stratosphere.


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