Definition of iliac in US English:



  • Relating to the ilium or the nearby regions of the lower body.

    ‘the iliac artery’
    • ‘Aneurysms of the infrarenal abdominal aorta and iliac arteries coexist to such a degree that they may be considered a single clinical entity.’
    • ‘This dilation may extend into the iliac arteries or above the renal vessels.’
    • ‘At this level the bifurcation of the abdominal aorta into common iliac arteries has almost been completed.’
    • ‘The left common iliac artery is seen at the point of bifurcation into external and internal iliac arteries.’
    • ‘The other case showed a similar appearance with mild induration and mild swelling in the right iliac region.’


Early 16th century: from late Latin iliacus, from ilia ‘entrails’.