chorion Hear it!

chorion Definition

cho·rion (kôr′ē än′)

noun

  1. the outermost of the two membranes that completely envelop a fetus
  2. the outer membrane or shell of the eggs of insects and other invertebrates

Etymology: ModL < Gr chorion, fetal membrane: for IE base see yarn

Related Forms:

  • chorionic cho′·ri·on′ic (-än′ik) adjective
chorion Usage Examples

Converse of object

  • share: One important question is whether or not the twins shared a chorion in the womb.

Modifies a noun

  • villus: Mums-to-be are currently offered the traditional method in which a needle is inserted inside the womb ( amniocentesis or chorion villus sampling ).
  • sampling: Mums-to-be are currently offered the traditional method in which a needle is inserted inside the womb ( amniocentesis or chorion villus sampling ).