noun (not used technically)
the upper troposphere.
Origin of substratosphere
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for substratosphere
Historical Examples of substratosphere
It hadn't looked so big from the substratosphere in Alexander's ship, but down here close to the ground it was enormous.The Lani People
J. F. Bone