/ Dictionary / Index T tympanic bone: Meaning and Definition of Find definitions for: tympan'ic bone' Pronunciation: [key] — Anat., Zool. Anat.,Zool. (in mammals) a bone of the skull, supporting the tympanic membrane and enclosing part of the tympanum or middle ear. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tympanic tympanic membrane Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language