English

exochorion

From exo- + chorion.

Proto-Indo-European *h₁eǵʰs ‘out of’

Proto-Hellenic *eks

Ancient Greek ἐκ ‘Out of, from’

Ancient Greek ἔξω ‘outer’

English exo-

Ancient Greek χόριον ‘membrane surrounding the fetus, afterbirth’

Late Latin chorion

Today it means

noun The outer layer of the chorion of an insect egg

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

Etymograph / exochorion