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orthodontics

noun
🔊/ˌɔːθəˈdɒntɪks/
🔊/ˌɔːrθəˈdɑːntɪks/
[uncountable]
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  1. the treatment of problems relating to the position of the teeth and jaws口腔正畸术
    More Like This Uncountable nouns ending in –icsUncountable nouns ending in –ics
    Word Originearly 20th cent.: from ortho- ‘straight’ + Greek odous, odont- ‘tooth’.