gluteus maximus

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gluteus maximus

(măk′sə-məs)
n. pl. glutei maximi (măk′sə-mī′)
The largest and outermost of the gluteal muscles.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

gluteus maximus

The largest of the three flat buttock or rump muscles. The gluteal muscles arise from the back of the pelvis and are inserted into the back of the upper part of the thigh bone (femur). They straighten (extend) the hip joint in rising from a stooping position and in running, climbing and going upstairs.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005