NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,122 terms related to cancer and medicine.

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urachus
(YOO-rah-kus)
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.