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Meaning of yolk sac | Babel Free

Noun CEFR B2

Definitions

A membranous sac attached to an embryo, providing early nourishment in the form of yolk in bony fishes, sharks, reptiles, birds, and primitive mammals.

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

yolker yolkiness yolklessness Yolks Yoll Yolla

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