The term 'iliac' is a five-letter word that refers to something of or near the pelvis. It is derived from the Latin word ileum, which means 'FLANK, ' and is used to describe structures in the lower abdomen. The iliac region is located on either side of the abdomen, just above the hip bones. It includes the iliac crest, which is the uppermost part of the hip bone, as well as the iliac fossa, which is a shallow depression located between the two hip bones. The iliac vessels are also found in this region, which are important for supplying blood to the lower body.