1. sartorius - Noun
2. Sartorius - Proper noun
A muscle of the thigh, called the tailor's muscle, which arises from the hip bone and is inserted just below the knee. So named because its contraction was supposed to produce the position of the legs assumed by the tailor in sitting.
Source: Webster's dictionaryThe sartorius acts as a flexor on both the hip and knee, but, due to its oblique course, also contributes to medial rotation of the leg as one of the pes anserinus muscles (with the knee flexed), and to lateral rotation of the hip joint. Source: Internet
The semitendiosus and the semimembranosus share their origin with the long head of the biceps, and both attaches on the medial side of the proximal head of the tibia together with the gracilis and sartorius to form the pes anserinus. Source: Internet