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

Examples of sartorius in a Sentence

Recent Examples on the Web They are made up of 5 muscles: iliacus, psoas, pectineus, rectus femoris, and sartorius. Cori Ritchey, Men's Health, 7 Mar. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'sartorius.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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

First Known Use

1704, in the meaning defined above

Time Traveler
The first known use of sartorius was in 1704

Dictionary Entries Near sartorius

Cite this Entry

“Sartorius.” Dictionary, Merriam-Webster, Accessed 18 Jul. 2024.

Medical Definition


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