Definition of iliacus in English:

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Pronunciation: /iˈlīəkəs/
(also iliacus muscle)


A triangular muscle that passes from the pelvis through the groin on either side and, together with the psoas, flexes the hip.
Example sentences
  • The femoral nerve may run buried in a cleft of the iliacus under the psoas.
  • Accessory fasciculi may unite the pectineus with the obturator externus, the iliacus, the capsule of the hip, or the lesser trochanter.
  • The psoas lies deep in the abdomen; the iliacus lies to the side of the psoas on the inner surface of the ilium, the side bone of the hip.


Early 17th century: from late Latin.

For editors and proofreaders

Syllabification: i·li·a·cus

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