Definitions

1. adjective

relating to the chorion, the outermost membrane surrounding the embryo in early pregnancy.

“The chorionic villus sampling test was performed at the 10th week of pregnancy.”

2. noun

the chorion, the outermost membrane surrounding the embryo in early pregnancy.

“The doctor studied the chorionic cavity during the ultrasound scan.”

3. noun

a villus or villi of the chorion, especially in the human embryo.

“The chorionic villus sampling test revealed a chromosomal abnormality in the fetus.”