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YOLK SAC

Pronunciation (US): 

 Dictionary entry overview: What does yolk sac mean? 

YOLK SAC (noun)
  The noun YOLK SAC has 2 senses:

1. membranous structure that functions as the circulatory system in mammal embryos until the heart becomes functional
2. membranous structure enclosing the yolk of eggs in birds reptiles marsupials and some fishes; circulates nutrients to the developing embryo

  Familiarity information: YOLK SAC used as a noun is rare.


 Dictionary entry details 


YOLK SAC (noun)


Sense 1yolk sac [BACK TO TOP]

Meaning:

Membranous structure that functions as the circulatory system in mammal embryos until the heart becomes functional

Classified under:

Nouns denoting animals

Synonyms:

umbilical vesicle; vesicula umbilicus; vitelline sac; yolk sac

Hypernyms ("yolk sac" is a kind of...):

sac (a structure resembling a bag in an animal)


Sense 2yolk sac [BACK TO TOP]

Meaning:

Membranous structure enclosing the yolk of eggs in birds reptiles marsupials and some fishes; circulates nutrients to the developing embryo

Classified under:

Nouns denoting animals

Hypernyms ("yolk sac" is a kind of...):

sac (a structure resembling a bag in an animal)


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