1. plural of ilium; the broad, flat bones that form the upper part of the pelvis on each side of the body
Usage: anatomy; medical

Examples

• The ilia are the largest bones of the pelvis.
• Damage to the ilia can affect mobility and posture.
• In anatomy class, students learned to identify the ilia on a skeletal model.
• The ilia connect to the sacrum at the sacroiliac joints.
• X-rays revealed a fracture in one of the ilia.