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, ↑umbilical
• Part Meronyms: ↑amnion, ↑amniotic sac, ↑amnios, ↑chorion
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noun : an embryonic membrane
Useful english dictionary. 2012.