omphalomesenteric
/ˌɒmfələʊˌmɛs(ə)nˈtɛrɪk/ /ˌɒmfələʊˌmɛz(ə)nˈtɛrɪk/Anatomy and Embryology
adjective
Of or relating to the umbilicus (navel) and the mesentery; specifically designating fetal structures that connect the yolk sac or umbilical vesicle with the embryonic gut (now usually called vitelline).
Origin
Early 18th century (in an earlier sense). From omphalo- + mesenteric.