Psoas
Pronunciation : Pso"as
Part of Speech : n.
Etymology : [Gr. psoas.] (Anat.)
Definition : Defn: An internal muscle arising from the lumbar vertebr? 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.
Source : Webster's Unabridged Dictionary, 1913