aeropause[er′ō pôz′, er′ə-]
aeropause definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a region at the upper level of the earth's atmosphere, regarded as the boundary between the atmosphere and outer space
Origin: aero- plush pause
aeropause definition by American Heritage Dictionary
The region of the atmosphere above which aircraft cannot fly.