Sacroiliac
/ˌsækroʊˈɪliæk/noun
Relating to the sacrum and the ilium, especially the joint connecting them.
Did you know?The first element comes from Latin sacrum, originally meaning “sacred,” so one half of this joint’s name is literally tied to holiness before it became anatomy.
Etymological Timeline
Latin
Latin
sacrum
“the sacrum, a bone considered sacred”
Latin
Latin
ilium
“the broad upper bone of the pelvis”
19th Century
English
sacro-iliac
“relating to the joint between the sacrum and ilium”
Modern English
English
sacroiliac
“of or relating to the sacrum and ilium, especially the joint between them”