glutaeus

from The Century Dictionary.

• noun One of several muscles of the nates or buttocks, arising from the pelvis and inserted into the femur.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Anat.) The great muscle of the buttock in man and most mammals, and the corresponding muscle in many lower animals.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternative form of gluteus.