middle umbilical fold

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me·di·an um·bil·i·cal fold

[TA]
a fold of peritoneum on the anterior wall of the abdomen covering the urachus, or remains of the allantoic stalk.
References in periodicals archive ?
The median umbilical fold, which is the peritoneal covering of the umbilical ligament/ urachus, travels between the bladder and umbilicus in the midline anterior abdominal wall.