腸ちょう肋ろく筋きんMeanings1nouniliocostalis muscleanatomyAnatomical term for the iliocostalis muscle, part of the erector spinae group. Used in medical and anatomical contexts.腸ちょう肋ろく筋きんは脊せき柱ちゅう起き立りつ筋きんの一いち部ぶです。The iliocostalis muscle is part of the erector spinae muscles.