iliocostalis lumborum

noun
iliocostalis lum·​bor·​um | \ -ˌləm-ˈbȯr-əm How to pronounce iliocostalis lumborum (audio) \

Medical Definition of iliocostalis lumborum

: a muscle that extends from the ilium to the lower ribs and acts to draw the trunk to the same side or to depress the ribs

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