# chorion

> English word · Noun · IPA /ˈkɔɹiɑn/

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

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

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/chorion