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Related to fetal membrane: fetal membrane slip
Any of the membranous structures closely associated with or surrounding a developing vertebrate embryo, including the amnion, chorion, allantois, and yolk sac. Also called embryonic membrane.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||fetal membrane - any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus|
amnion, amnios, amniotic sac - thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
chorion - the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
allantois - the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)
embryonic membrane, caul, veil - the inner membrane of embryos in higher vertebrates (especially when covering the head at birth)
tissue layer, membrane - a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants
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