Allantoid Synonyms & Definitions

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• AllantoidDefinition & Meaning in English

1. (n.) A membranous appendage of the embryos of mammals, birds, and reptiles, -- in mammals serving to connect the fetus with the parent; the urinary vesicle.
2. (a.) Alt. of Allantoidal

• AllantoideaDefinition & Meaning in English

1. (n. pl.) The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals.

• AllantoidalDefinition & Meaning in English

1. (a.) Of or pertaining to the allantois.