English word chorio- comes from English chorion

Detailed word origin of chorio-

Dictionary entry	Language	Definition
chorion	English (eng)	(anatomy, biology) The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.. (biology, entomology) The outer case of an insect egg.. (botany) The outer membrane of seeds of plants.
chorio-	English (eng)	Chorion.