/ Dictionary / Index G gluteus medius: Meaning and Definition of Find definitions for: glu'teus me'di•us Pronunciation: (mē'dē-us), [key] — pl. glutei me•di•i the muscle of the buttocks lying between the gluteus maximus and the gluteus minimus, involved in the abduction of the thigh. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gluteus maximus gluteus minimus Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language