English

epichorion

From epi- + chorion.

Proto-Indo-European *h₁épi ‘on’

Proto-Hellenic *epí

Ancient Greek ἐπί ‘on, upon’

English epi-

Ancient Greek χόριον ‘membrane surrounding the fetus, afterbirth’

Late Latin chorion

Today it means

noun The part of the endometrium that covers the implanted early embryo

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

Etymograph / epichorion