You searched for: “aeropause
1. An upper region of the atmosphere, between the stratosphere and outer space, in which gas particles are so sparse as to provide almost no support for man's physiologic requirements or for vehicles that require air for burning fuel or where the air is so thin that aircraft can not operate properly.
2. A region at the upper level of the earth's atmosphere, regarded as the boundary between the atmosphere and outer space.
This entry is located in the following unit: aero-, aer-, aeri- (page 7)