/ Dictionary / Index M malleolus: Meaning and Definition of Find definitions for: mal•le•o•lus Pronunciation: (mu-lē'u-lus), [key] — pl. -li the bony protuberance on either side of the ankle, at the lower end of the fibula or of the tibula. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. malleolar mallet Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language