extra-atmospheric

[ ek-struh-at-muh s-fer-ik, -feer- ]
/ ˌɛk strəˌæt məsˈfɛr ɪk, -ˈfɪər- /

adjective

outside the earth's atmosphere.

Origin of extra-atmospheric

First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019