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Allantois   Listen
Allantois

noun
1.
The vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals).





WordNet 3.0 © 2010 Princeton University


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"Allantois" Quotes from Famous Books



... common air, Dr Black invited a party of friends to supper, informing them that he had a curiosity to show them. Dr Hutton, Mr Clerk of Eldin, and Sir George Clerk of Penicuik, were of the number. When the company invited had arrived, he took them into a room where he had the allantois of a calf filled with hydrogen gas, and, upon setting it at liberty, it immediately ascended and adhered to the ceiling. The phenomenon was easily accounted for; it was taken for granted that a small black thread had been attached to the allantois, that the thread passed through the ...
— Up in the Clouds - Balloon Voyages • R.M. Ballantyne


Words linked to "Allantois" :   mammal, fetal membrane, mammalian


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