DICT.TW Dictionary Taiwan
3.138.122.4
Search for:
▼[Show options]
[Pronunciation] [Help] [Database Info] [Server Info]

1 definition found

From: WordNet (r) 2.0

 vesicula umbilicus
      n : membranous structure that functions as the circulatory
          system in mammal embryos until the heart becomes
          functional [syn: yolk sac, vitelline sac, umbilical
           vesicle]