psoas | (n) either of two muscles of the abdomen and pelvis that flex the trunk and rotate the thigh |
Psoas | n. [ Gr. &unr_; a muscle of the loin: cf. f. psoas. ] (Anat.) An internal muscle arising from the lumbar vertebræ and inserted into the femur. In man there are usually two on each side, and the larger one, or great psoas, forms a part of the iliopsoas. [ 1913 Webster ] |