/ Dictionary / Index Q quadriceps: Meaning and Definition of Find definitions for: quad•ri•ceps Pronunciation: (kwod'ru-seps"), [key] — pl. -ceps•es -ceps. a large muscle in front of the thigh, the action of which extends the leg or bends the hip joint. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quadriceps (Thesaurus) quadricentennial quadric surface Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language