psoas

[soh-uhs]

pso·as

[soh-uhs]
noun, plural pso·ai [soh-ahy] , pso·ae [soh-ee] . Anatomy.
either of two muscles, one on each side of the loin, extending internally from the sides of the spinal column to the upper end of the femur, which assist in flexing and rotating the thigh and flexing the trunk on the pelvis.

Origin:
1675–85; < Neo-Latin < Greek psóās, accusative plural (taken as nominative singular) of psóa a muscle of the loins

pso·at·ic [soh-at-ik] , adjective
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Psoas is always a great word to know.
So is optic nerve. Does it mean:
either one of the second pair of cranial nerves, consisting of sensory fibers that conduct impulses from the retina to the brain
the system by which oxygen is taken into the body; in mammals the system includes the nasal passages, pharynx, trachea, bronchi, and lungs
Collins
World English Dictionary
psoas (ˈsəʊəs)
 
n
either of two muscles of the loins that aid in flexing and rotating the thigh
 
[C17: from New Latin, from Greek psoai (pl)]

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