Embryonic Structure
urachus Audio
[ yoo-rah-kus ]
Subclass of:
Embryonic Structures
Etymology:
Greek ourachos; from ouron = urine + achos, perhaps from echein = to hold
Definitions related to urachus:
  • A cord of fibrous tissue that extends from the urinary bladder to the umbilicus. The urachus is a remnant of the fetal urinary canal.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
  • 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.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • An embryonic structure originating from the ALLANTOIS. It is a canal connecting the fetal URINARY BLADDER and the UMBILICUS. It is normally converted into a fibrous cord postnatally. When the canal fails to be filled and remains open (patent urachus), urine leaks through the umbilicus.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.