iliopsoas
noun
il·io·pso·as
| \ ˌil-ē-ō-ˈsō-əs
, ˌil-ē-ˈäp-sə-wəs
\
, ˌil-ē-ˈäp-sə-wəs
\
Medical Definition of iliopsoas
: a muscle consisting of the iliacus and psoas major muscles