orthodontics
/ˌɔːθəʊˈdɒntɪks/(亦作orthodontia /-ʃɪə/)
plural noun
treated as sing.
- the treatment of irregularities in the teeth and jaws正牙学。
派生词
orthodontic
adjectiveorthodontically
adverborthodontist
noun词源
early 20th cent.: from ortho- 'straight' + Greek odous, odont- 'tooth'.