/ Dictionary / Index O odonto-: Meaning and Definition of Find definitions for: odonto- Pronunciation: [key] a combining form meaning “tooth,” used in the formation of compound words: odontology. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. odontiasis odontoblast 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