English Dictionary |
ALLANTOIS
Pronunciation (US): | (GB): |
Dictionary entry overview: What does allantois mean?
• ALLANTOIS (noun)
The noun ALLANTOIS has 1 sense:
1. the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)
Familiarity information: ALLANTOIS used as a noun is very rare.
Dictionary entry details
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:
Nouns denoting animals
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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