SG Heritage Dictionary

Chorion [Noun] Webster's Dictionary 1828

In anatomy, the exterior membrane which invests the fetus in utero.

Chorion [Noun] Webster's Dictionary 1913

1. The outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development.

2. The true skin, or cutis.

3. The outer membrane of seeds of plants.