Ĭl/i-ăc or Ĭ-lĭ'ăc-al, a.
a. [N. Lat. iliacus, from ilia, groin, flank, small intestines; N. Lat. ileum, ileon, the last part of the small intestines, from Gr. εἰλεῖν, εἱλεῖν, to roll or twist up; Fr. iliaque, It. & Sp. iliaco.]
Sense 1. Pertaining to the ilium or flank-bone; in the direction of the ilium; as, the iliac artery.
Sense 2. Pertaining to the third division of the lower intestine. See ILEAC.
Iliac crest, the upper margin of the ilium.—Iliac regions, the sides of the abdomen between the ribs and the hips.