[sak-roh-il-ee-ak, sey-kroh-]Anatomy


the joint where the sacrum and ilium meet.


of, relating to, or affecting this joint.

Nearby words

  1. sacro-,
  2. sacroanterior position,
  3. sacrococcygeal,
  4. sacrococcygeal muscle,
  5. sacrodynia,
  6. sacrolumbar,
  7. sacroposterior position,
  8. sacrosanct,
  9. sacrosciatic,
  10. sacrospinal

Origin of sacroiliac

First recorded in 1825–35; sacro- + iliac Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sacroiliac

  • For a man who is pushing 60, I'm in pretty good shape except for my sacroiliac.

    All That Goes Up|Kirby Brooks

British Dictionary definitions for sacroiliac



of or relating to the sacrum and ilium, their articulation, or their associated ligaments


the joint where these bones meet
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for sacroiliac


[săk′rō-ĭlē-ăk′, sā′krō-]


Of, relating to, or affecting the sacrum and ilium and their articulation or associated ligaments.


The sacroiliac region or cartilage.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.