sartorius

n., pl., -to·ri·i (-tôr'ē-ī, -tōr'-).
A flat narrow thigh muscle, the longest of the human anatomy, crossing the front of the thigh obliquely from the hip to the inner side of the tibia.

[New Latin, from Late Latin sartor, tailor (from its producing the cross-legged position of a tailor at work), from sartus, past participle of sarcīre, to mend.]

The common name for sartorius muscle, so-named because it helps effect the cross-legged position, which was often adopted by tailors (see sartorius).

(sär-tôr'ē-əs)
n.

A muscle with origin from the anterior superior spine of the ilium, with insertion into the medial border of the tuberosity of the tibia, with nerve supply from the femoral nerve, and whose action flexes the thigh and leg and rotates the leg medially and the thigh laterally. Also called tailor's muscle.

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The noun has one meaning:

Meaning #1: a muscle in the thigh that helps to rotate the leg into the sitting position assumed by a tailor; the longest muscle in the human body
  Synonyms: sartorius muscle, musculus sartorius

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