yolk sac


Definition: Meaning of, yolk sac in English to English dictionary.

Pronunciation: / jəʊk sak /

  • noun
  • synonym
  • antonym
Word Forms:
Singular Plural
yolk sac yolk sacs
  1. membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
    ANTONYM
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  2. membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo
    SYNONYM
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    ANTONYM
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