| Pronunciation: | | u'lantowis
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 WordNet Dictionary |
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| | Definition: | |
[n] vascular fetal membrane that develops from the hindgut in embryonic higher vertebrates (mammals; birds; reptiles) |
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ALLANTOIS is a 9 letter word that starts with A. |
| | See Also: | | fetal membrane |
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| Webster's 1913 Dictionary |
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| | Definition: | | \Al*lan"to*is\, Allantoid \Al*lan"toid\, ] n.. (Anat.)
A membranous appendage of the embryos of mammals, birds, and
reptiles, -- in mammals serving to connect the fetus with the
parent; the urinary vesicle.
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| Glossary |
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| | Definition: | | a sack within the amniote egg in which waste products produced by the embryo are deposited. |
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