English
exoatmosphere
From exo- + atmosphere.
Formed from exo- + atmosphere
Proto-Indo-European *h₁eǵʰs ‘out of’
Proto-Hellenic *eks
Ancient Greek ἐκ ‘Out of, from’
Ancient Greek ἔξω ‘outer’
English exo-
Today it means
noun The region of space just outside the atmosphere proper; the outer atmosphere.
Language periods are conventional ranges, not dates for this word.
Etymograph / exoatmosphere