English

exoperidium

From exo- + peridium.

Proto-Indo-European *h₁eǵʰs ‘out of’

Proto-Hellenic *eks

Ancient Greek ἐκ ‘Out of, from’

Ancient Greek ἔξω ‘outer’

English exo-

Ancient Greek πηρίδιον ‘little pouch’

Today it means

noun The outer layer of a two-layered peridium

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

Etymograph / exoperidium