1. Also called common iliac artery. either of two large arteries that conduct blood to the pelvis and the legs.
2. Also called external iliac artery. the outer branch of an iliac artery that becomes the femoral artery.
3. Also called hypogastric artery, internal iliac artery. the inner branch of an iliac artery that conducts blood to the gluteal region.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.