Adjective
exoatmospheric (not comparable)
Pertaining to, or occurring in the nearby region of space outside the Earth's atmosphere
exoatmospheric (not comparable)
Abbreviation of exoplanetary atmospheric. (Pertaining to the atmospheres of exoplanets)
The technology developed for the HOE system was later used by the SDI and expanded into the Exoatmospheric Reentry-vehicle Interception System (ERIS) program. Source: Internet