English

exobiologist

From exo- + biologist.

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 A biologist whose speciality is exobiology.

Language periods are conventional ranges, not dates for this word.

Etymograph / exobiologist