Omphalomesenteric a. : Of or pertaining to the umbilicus and mesentery; omphalomesaraic; as, the omphalomesenteric arteries and veins of a fetus.

Example:
my daughter has been dignosed with "Pantent Omphalomesenteric Duct "?

Taxonomy
omphalomesenteric, embryology, Dictionary, pha, ic, pertaining, umbilicus, Omphalo, mesenteric, Anat, mesentery, arteries and veins, Unanswered questions, Medical Dictionary, yolk sac, embryonal, vitelline duct, Webster 1913.

Defination from the web:
... (Anat.) Of or pertaining to the umbilicus and mesentery; omphalomesaraic; as, the omphalomesenteric arteries and veins of a fetus. English ...