urachus

From New Latin ūrachus, from Ancient Greek οὐραχός (ourakhós).

urachus (plural urachi or urachuses)

1. (anatomy) A band of fibrous tissue extending from the bladder to the umbilicus.
   • 2003, Douglas H. Slatter, Textbook of Small Animal Surgery, volume 1, page 1631:

     A persistent urachus exists if the entire urachal tube remains patent between the bladder and umbilicus.

• urachal