/ Dictionary / Index M malleus: Meaning and Definition of Find definitions for: mal•le•us Pronunciation: (mal'ē-us), [key] — pl. mal•le•i the outermost of a chain of three small bones in the middle ear of mammals. Also calledCf.(def. 1),See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: malleus (Thesaurus) mallet Mallia Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language