a cord or band of fibrous tissue extending from the bladder to the umbilicus
The urachus is a fibrous remnant of the allantois, a canal that drains the urinary bladder of the fetus that joins and runs within the umbilical cord. The fibrous remnant lies in the space of Retzius, between the transversalis fascia anteriorly and the peritoneum posteriorly.
Chambers 20th Century Dictionary
ū′ra-kus, n. one of the ligaments of the bladder formed by the remaining constricted portion of the allantois of the fœtus. [Gr. ourachos—ouron, urine.]
U.S. National Library of Medicine
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.
The numerical value of urachus in Chaldean Numerology is: 8
The numerical value of urachus in Pythagorean Numerology is: 1
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