psoas

American  

[soh-uhs] / ˈsoʊ əs /

noun

Anatomy.

• psoai,
  plural
• psoae
  plural

1. 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.

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psoas British  

/ ˈsəʊəs /

noun

1. either of two muscles of the loins that aid in flexing and rotating the thigh

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Other Word Forms

Derived Forms

• psoatic
  adjective

Inflected Forms

Nouns

• psoae
  plural
• psoai
  plural

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Etymology

Origin of psoas

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

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Example Sentences

See Examples For:

psoas

The psoas is involved in hip movement, so it is not clear whether Nacua’s absence was caused by the same injury or a new one.

From Los Angeles Times ● Sep. 18, 2026

Ms Coles said the tumour has grown in her psoas muscle in the lower lumbar region of her spine.

From BBC ● Feb. 15, 2022

“But I had a labral tear and my psoas muscle was almost severed due to a structural abnormality in my hip. It wasn’t pretty.”

From New York Times ● Aug. 30, 2019

I’ve been under the ministrations of many physical therapists who knead and rub and press my mercurial, angry psoas.

From Salon ● Jul. 26, 2015

The anterior abscess emerges on one or other side of the psoas muscle; from the resistance offered by the fascia lata, the pus may gravitate down the thigh before perforating the fascia.

From Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition. by Alexander Miles

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