the atmospheric layer lying between the stratosphere and the thermosphere, characterized by a rapid decrease in temperature with height
2.
the solid part of the earth's mantle lying between the asthenosphere and the core
Derived forms
mesospheric (ˌmɛsəʊˈsfɛrɪk)
adjective
mesosphere in American English
(ˈmɛsoʊˌsfɪr; ˈmɛzoʊˌsfɪr)
noun
the atmospheric zone or shell located above the stratopause at an altitude of c. 55 to 80 km (c. 34 to 50 miles) and characterized by a decrease in temperature with increasing altitude