orthodontics in British English
(ˌɔːθəʊˈdɒntɪks) or orthodontia (ˌɔːθəʊˈdɒntɪə)
noun(functioning as singular) the branch of dentistry concerned with preventing or correcting irregularities of the teeth
Also called: dental orthopaedics Derived forms
orthodontic (ˌorthoˈdontic) adjective
orthodontist (ˌorthoˈdontist) noun