Etymology
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orthodontics (n.)

"orthodontia, the branch of dentistry concerned with the treatment of irregularities of the teeth and jaws," 1909, from orthodontic (adj.); also see -ics.

updated on October 02, 2019

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Definitions of orthodontics from WordNet

orthodontics (n.)
the branch of dentistry dealing with the prevention or correction of irregularities of the teeth;
Synonyms: orthodontia / orthodonture / dental orthopedics / dental orthopaedics
From wordnet.princeton.edu, not affiliated with etymonline.