You searched for: “exoatmospheric
exoatmospheric (adjective) (not comparable)
Concerning the region of space outside the atmosphere: The exoatmospheric area is the uppermost layer where the atmosphere thins out and connects with outer space. It exists immediately above the thermosphere.
This entry is located in the following units: atmo-, atm- + (page 6) sphero-, spher-, -sphere- (page 7)