Ilium

ahd-5
  • noun. The uppermost and widest of the three bones constituting either of the lateral halves of the pelvis.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. The ileum.
  • noun. The upper and widest of the three bones that make up each side of the hipbone and pelvis.
  • Word Usage
    "The ilium is short anterposteriorly relative to the length of the pelvis."
    Form
    iliac