Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of allantoid is as below...

Allantoid :: Allantoid (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..

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

Allantoidal :: Allantoidal (a.) Of or pertaining to the allantois.

Allantoid :: Allantoid (a.) Alt. of Allantoida.

Anallantoidea :: Anallantoidea (n. pl.) The division of Vertebrata in which no allantois is developed. It includes amphibians, fishes, and lower forms..

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