\C[oe]"li*ac\, Celiac \Ce"li*ac\, a. [L. coeliacus, Gr. ?, fr. ? belly, fr. ? hollow.] Relating to the abdomen, or to the cavity of the abdomen. {C[oe]liac artery} (Anat.), the artery which issues from the aorta just below the diaphragm; -- called also {c[oe]liac axis}. {C[oe]liac flux}, {C[oe]liac passion} (Med.), a chronic flux or diarrhea of undigested food.