sar·​to·​ri·​us | \ sär-ˈtȯr-ē-əs How to pronounce sartorius (audio) \
plural sartorii\ sär-​ˈtȯr-​ē-​ˌī How to pronounce sartorius (audio) , -​ē-​ˌē \

Definition of sartorius

: a muscle that crosses the front of the thigh obliquely, assists in rotating the leg to the cross-legged position in which the knees are spread wide apart, and in humans is the longest muscle

First Known Use of sartorius

1704, in the meaning defined above

History and Etymology for sartorius

New Latin, from Medieval Latin sartor tailor, from Latin sarcire to mend

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The first known use of sartorius was in 1704

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Cite this Entry

“Sartorius.” Dictionary, Merriam-Webster, Accessed 18 Jan. 2021.

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More Definitions for sartorius


sar·​to·​ri·​us | \ sär-ˈtōr-ē-əs How to pronounce sartorius (audio) \
plural sartorii\ -​ē-​ˌī How to pronounce sartorius (audio) \

Medical Definition of sartorius

: a muscle that arises from the anterior superior iliac spine, crosses the front of the thigh obliquely to insert on the upper part of the inner surface of the tibia, is the longest muscle in the human body, and acts to flex, abduct, and rotate the thigh laterally at the hip joint and to flex the leg at the knee joint and to rotate it medially in a way that enables one to sit with the heel of one leg on the knee of the opposite leg

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