Ilium

Definition

The ilium is the uppermost and largest part of the hip bone, contributing significantly to the pelvic girdle's structure and stability. It supports the weight of the body when sitting or standing and provides attachment points for several muscles and ligaments.

Related terms

Pelvic Girdle: The ring-like bony structure, located in the lower part of the trunk, composed of the two hip bones (including ilia), sacrum, and coccyx, providing support for body weight and attachment for limbs.

Sacroiliac Joint: The joint where the sacrum meets the ilium on each side of the lower back, allowing for slight movement and serving as a shock absorber between upper body weight and lower limbs.

Acetabulum: A deep cup-shaped cavity on each hip bone that articulates with the head of the femur (thigh bone), forming the hip joint