\Il"i*ac\, a. [L. Iliacus, Gr. ?. See {Iliad}.]
Pertaining to ancient Ilium, or Troy. --Gladstone.

\Il"i*ac\, a. [Cf. F. iliaque. See {Ileum}, and cf. {Jade}
a stone.]
1. (Anat.) Pertaining to, or in the region of, the ilium, or
   dorsal bone of the pelvis; as, the iliac artery. [Written
   also {ileac}.]
2. See {Ileac}, 1. [R.]
{Iliac crest}, the upper margin of the ilium.
{Iliac passion}. See {Ileus}.
{Iliac region}, a region of the abdomen, on either side of
   the hypogastric regions, and below the lumbar regions.