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Urachus
Pronunciation
Definition 1
A fibrous cord that connects the urinary bladder to the umbilicus (navel). The urachus is formed as the allantoic stalk during fetal development and lasts through life. Also called median umbilical ligament. (NCI Dictionary)
Definition 2
The urinary canal of the fetus; postnatally it is usually a fibrous cord but occasionally persists as a vesicoumbilical fistula. (NLM, Medical Subject Headings)
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