ˌsemēˌmembrəˈnōsəs noun
( plural semi·membrano·si -ōˌsī)
Etymology: New Latin, from Latin semi- + Late Latin membranosus membranous, from Latin membrana membrane + -osus -ose — more at membrane
: a large muscle of the inner part and back of the thigh arising by a thick tendon from the back part of the tuberosity of the ischium and inserted into the medial condyle of the tibia