/ Dictionary / Index O orthodontia: Meaning and Definition of Find definitions for: or•tho•don•tia Pronunciation: (ôr"thu-don'shu, -shē-u), [key] — n. Dentistry. orthodontics. treatment for the correction of irregularly aligned teeth, usually involving braces and sometimes oral surgery. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: orthodontia (Thesaurus) ortho-dichlorobenzene orthodontics Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language