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Added 10 October 2026

chorion

/ˈkɔɹiɑn/ noun

In Latin: chorion Wiktionary

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about chorion at Wordnik → Where our words come from →

The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.
The outer case of an insect egg.
The outer membrane of seeds of plants.

Origin

From Late Latin chorion, from Ancient Greek χόριον (khórion, “membrane surrounding the fetus, afterbirth”).

From Wiktionary, via Kaikki.org (CC BY-SA)

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