Of or pertaining to the chorion: as, the chorionic membrane; chorionic villi.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. of or relating to a chorion
Word Usage
"The test is uncomfortable and carries a small risk of miscarriage, as does another invasive test for genetic disorders called chorionic villus sampling, or CVS, that samples tissue from the placenta."