Noun
semimembranosus (plural semimembranosi)
English Wikipedia has an article on:semimembranosusWikipedia
(anatomy) A muscle in the back of the thigh; the most medial of the three hamstring muscles (meaning it is more to the inner of the thighs, not between the two others in one leg, which is the semitendinosus).
Distally, the semimembranosus' tendon is divided into three parts referred to as the pes anserinus profondus. 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