/ Dictionary / Index M modiolus: Meaning and Definition of Find definitions for: mo•di•o•lus Pronunciation: (mō-dī'u-lus, mu-), [key] — pl. -li the central, conical axis of the cochlea of the ear. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: modiolus (Thesaurus) modillion modish Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language