/ Dictionary / Index O odontiasis: Meaning and Definition of Find definitions for: o•don•ti•a•sis Pronunciation: (ō"don-tī'u-sis), [key] — n. Dentistry. dentition (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: odontiasis (Thesaurus) odontalgia odonto- Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language