aero pause


noun Aeronautics.
the indefinite boundary in the upper atmosphere beyond which the air is too thin for conventional aircraft to operate.

1950–55; aero- + pause Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
aeropause (ˈɛərəˌpɔːz)
the region of the upper atmosphere above which aircraft cannot fly

Collins English Dictionary - Complete & Unabridged 10th Edition
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