-ˈmaksəməs noun
( plural glutei maxi·mi -səˌmī)
Etymology: New Latin, literally, largest gluteus
: the outermost muscle of three muscles found in each of the human buttocks that arises from the sacrum, coccyx, back part of the ilium and adjacent structures and that is inserted into the fascia lata of the thigh and the gluteal tuberosity of the femur