Allantois (noun) Definition, Meaning & Examples

noun Embryology, Zoology.
  1. a vascular, extraembryonic membrane of birds, reptiles, and certain mammals that develops as a sac or diverticulum from the ventral wall of the hindgut.
noun
  1. a membranous sac growing out of the ventral surface of the hind gut of embryonic reptiles, birds, and mammals. It combines with the chorion to form the mammalian placenta
Plural allantoides (ăl′ən-tōĭ-dēz′)
    Allantois (noun) Definition, Meaning & Examples

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