chorion

Noun

Meaning

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

The true skin, or cutis.

The outer membrane of seeds of plants.

Source: Webster's dictionary

sac chorionic fetal membrane

sac

The group changed its name to Chorion in 1998, but after financial difficulties in 2012 sold its assets. Source: Internet