Taber's Medical Dictionary
urachus
(ū′ră-kŭs )
To hear audio pronunciation of this topic, purchase a subscription or log in.[Gr. ourachos, fetal urinary canal]
A transient embryonic structure, the tube connecting the top of the developing bladder and the umbilical cord. It is derived from the allantois of the embryo. Postnatally it becomes filled with cells and in the adult remains only as a ligamentous cord (median umbilical ligament).
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Citation
Venes, Donald, editor. "Urachus." Taber's Medical Dictionary, 25th ed., F.A. Davis Company, 2025. Taber's Online, www.tabers.com/tabersonline/view/Tabers-Dictionary/771041/all/urachus.
Urachus. In: Venes DD, ed. Taber's Medical Dictionary. F.A. Davis Company; 2025. https://www.tabers.com/tabersonline/view/Tabers-Dictionary/771041/all/urachus. Accessed April 19, 2026.
Urachus. (2025). In Venes, D. (Ed.), Taber's Medical Dictionary (25th ed.). F.A. Davis Company. https://www.tabers.com/tabersonline/view/Tabers-Dictionary/771041/all/urachus
Urachus [Internet]. In: Venes DD, editors. Taber's Medical Dictionary. F.A. Davis Company; 2025. [cited 2026 April 19]. Available from: https://www.tabers.com/tabersonline/view/Tabers-Dictionary/771041/all/urachus.
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