the boundary or transition layer between the stratosphere and mesosphere.
Origin of stratopause
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
meteorol the transitional zone of maximum temperature between the stratosphere and the mesosphere
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
The boundary between the stratosphere and the mesosphere, located at an altitude of about 50 km (31 mi) above the Earth's surface.
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