Definition of orthodontics noun from the Oxford Advanced American Dictionary

 

orthodontics

 noun
noun
NAmE//ˌɔrθəˈdɑntɪks//
 
[uncountable]
 
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the treatment of problems concerning the position of the teeth and jaws
orthodontic
 
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adjective orthodontic treatment
See the Oxford Advanced Learner's Dictionary entry: orthodontics