embryonic membrane.
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embryonic membrane — n. any of several living membranes enclosing or closely associated with the developing vertebrate embryo, as the allantois, amnion, yolk sac, etc. * * * … Universalium
embryonic membrane — n a structure (as the amnion) that derives from the fertilized ovum but does not form a part of the embryo … Medical dictionary
embryonic membrane — n. any of several living membranes enclosing or closely associated with the developing vertebrate embryo, as the allantois, amnion, yolk sac, etc … English World dictionary
embryonic membrane — noun the inner membrane of embryos in higher vertebrates (especially when covering the head at birth) • Syn: ↑caul, ↑veil • Hypernyms: ↑fetal membrane • Part Holonyms: ↑placenta * * * noun … Useful english dictionary
embryonic membrane — em′bryon′ic mem′brane n. dvl extraembryonic membrane • Etymology: 1945–50 … From formal English to slang
embryonic membrane. — See extraembryonic membrane. [1945 50] … Useful english dictionary
embryonic membrane — noun Date: 1947 a structure (as the amnion) that derives from the fertilized ovum but does not form a part of the embryo … New Collegiate Dictionary
membrane — 1. A thin sheet or layer of pliable tissue, serving as a covering or envelope of a part, as the lining of a cavity, as a partition or septum, or to connect two structures. SYN: membrana [TA]. 2. SYN: biomembrane. [L. membrana, a skin or m … Medical dictionary
fetal membrane — noun any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus • Hypernyms: ↑membrane, ↑tissue layer • Hyponyms: ↑allantois, ↑caul, ↑veil, ↑embryonic membrane, ↑umbilical cord … Useful english dictionary
extraembryonic membrane — Embryol. 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 embryonic membrane. * * * … Universalium
