The Collaborative International Dictionary
Iliac \Il"i*ac\, a. [Cf. F. iliaque. See Ileum, and cf. Jade a stone.]
(Anat.) Pertaining to, or in the region of, the ilium, or dorsal bone of the pelvis; as, the iliac artery. [Written also ileac.]
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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.
Wiktionary
n. (context anatomy English) The visible impressions made by the ilium marking the top of the pelvis at the threshold of the torso and lower extremity.
Wikipedia
The crest of the ilium (or iliac crest) is the superior border of the wing of ilium and the superolateral margin of the greater pelvis.
Usage examples of "iliac crest".
Her long tightly fitting black dress gave peculiar emphasis to such major bone formations as the iliac crest, and indeed the entire pelvis.
These guys implanted it in the iliac crest of the pelvis, some opted for the mastoid bone in the skull-anywhere a big bone was close to the surface.