Definition of sartorius in US English:


(also sartorius muscle)


  • A long, narrow muscle running obliquely across the front of each thigh from the hipbone to the inside of the leg below the knee.

    • ‘The superficial branch supplies sensory innervation to the skin of the anterior thigh and motor innervation to the sartorius muscle.’
    • ‘Of the anterior group of muscles, those seen at this level include the sartorius and quadriceps femoris.’
    • ‘It passes between the dorsal border of the sartorius and the anterior border of the tendon of gracilis.’
    • ‘The anserine bursa is a fairly large bursa that ties behind the tendons of sartorius, gracilis, and semitendinous muscles and the tibial collateral ligament.’
    • ‘Pain on the back of the medial of our knees may be caused by friction of three muscles rubbing together - your sartorius, gracilis and semitendinosus.’


Early 18th century: modern Latin, from Latin sartor ‘tailor’ (because the muscle is used when adopting a cross-legged position, earlier associated with a tailor's sewing posture).