[ ˌɔ:θə'dɒntɪks ]
(also orthodontia -'dɒntɪə )
■ plural noun [treated as sing. ] the treatment of irregularities in the teeth and jaws.
Derivatives
orthodontic adjective
orthodontically adverb
orthodontist noun
Origin
early 20th cent.: from ortho- + Gk odous , odont- 'tooth'.