pso·as /ˈsoəs/ 名詞
腰(大)肌
Pso·as n. 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.
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psoas
n : either of two muscles of the abdomen and pelvis that flex
the trunk and rotate the thigh