Definition

1. Adjective:
   • Relating to the ilium: Pertaining to or associated with the ilium, which is the uppermost and largest bone of the pelvis.

Usage

• The adjective "iliac" is used primarily in medical, anatomical, and biological contexts to describe structures, regions, or conditions connected to the ilium bone.
• It typically precedes a noun (e.g., iliac artery, iliac crest) to specify a particular anatomical feature.

Examples

• Adjective:
  • The surgeon carefully examined the patient's iliac crest for any signs of fracture.
  • A common site for bone marrow biopsy is the iliac crest.
  • The iliac arteries supply blood to the pelvis and lower limbs.

Advanced Usage

• "Iliac" in Medical Terminology: The word is almost exclusively used in compound anatomical terms. Its meaning is fixed and technical.
  • The iliac fossa is a smooth, concave surface on the inner side of the ilium.

Variants and Related Words

• Ilium (noun): The specific, large, flaring bone that forms the upper part of each side of the hip bone.
• Iliacus (noun): A flat, triangular muscle that lies in the area of the ilium (the iliac fossa) and flexes the thigh.
• Iliolumbar (adjective): Relating to or connecting the ilium and the lumbar region of the spine.

Synonyms

• Pelvic (adj): Relating to the pelvis. While "pelvic" is broader (encompassing the entire pelvis), "iliac" is more specific to the ilium bone. They are not always interchangeable.
  • The iliac region is a part of the larger pelvic region.

Notes on Different Meanings

• The word "iliac" has a single, precise anatomical meaning. It does not have common idiomatic or phrasal verb uses.
• The archaic meaning related to the ileum (a part of the small intestine), as noted in some historical texts, is obsolete in modern English usage. The contemporary term for that structure is "ileal."

Adjective

1. of or relating to the ilium