Meaning of extraembryonic membrane

ex'traembryon'ic mem'brane

Pronunciation: [key]
— Embryol. Embryol.
  1. any of the tissues, derived from the fertilized egg, that enclose or otherwise contribute to the support of the developing embryo, as the yolk sac, allantois, amnion, and chorion. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.