From psoas + -itis. <span class="searchmatch">psoitis</span> (uncountable) (medicine) Inflammation of a psoas muscle or its sheath....
psoas major and psoas minor, involved in flexion of the trunk. iliopsoas <span class="searchmatch">psoitis</span> muscle Pasos, Posas, possa, soaps Borrowed from Ancient Greek ψόας (psóas)...