/ Dictionary / Index O odontograph: Meaning and Definition of Find definitions for: o•don•to•graph Pronunciation: (ō-don'tu-graf", -gräf"), [key] — n. an instrument for laying out the forms of gear teeth or ratchets. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. odontoglossum odontoid Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language