Dictionary.net

The urinary canal of the fetus; postnatally it is usually a fibrous cord but occasionally persists as a vesicoumbilical fistula.

Cord joining umbilicus and bladder.

The median umbilical ligament; the fibrous cord extending from bladder to umbilicus.

Cord which connects the bladder to the navel.

In the embryo, a tubular extension of the walls of the urinary bladder toward and in part through the umbilicus to join the allantois; in the human embryo, it does not generally pass beyond the root of the umbilical cord. In the adult, a ligamentous cord resulting from obliteration of the u. of the embryo connecting the bladder with the front wall of the abdomen. [Gr.]