allantois
Definitions
A sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles.
Equivalents
7 more languages
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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