| / English Dictionary |
ALLANTOIS
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
The vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)
Classified under:
Hypernyms ("allantois" is a kind of...):
fetal membrane (any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus)
Domain category:
mammal; mammalian (any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk)
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