orthodontics

[awr-thuh-don-tiks]
noun (used with a singular verb)
the branch of dentistry dealing with the prevention and correction of irregular teeth, as by means of braces.

Origin:
1905–10; orth- + -odont + -ics

orthodontic, orthodontal, adjective
orthodontist, noun
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World English Dictionary
orthodontics or orthodontia (ˌɔːθəʊˈdɒntɪks, ˌɔːθəʊˈdɒntɪə)
 
n
(functioning as singular) Also called: dental orthopaedics the branch of dentistry concerned with preventing or correcting irregularities of the teeth
 
orthodontia or orthodontia
 
n
 
ortho'dontic or orthodontia
 
adj
 
ortho'dontist or orthodontia
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

orthodontics
1909, from Mod.L. orthodontia (1849), from ortho- (q.v.) + odon (gen. odontos) "tooth." Orthodontist is attested from 1903.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

orthodontics or·tho·don·tics (ôr'thə-dŏn'tĭks) or or·tho·don·ture (ôr'thə-dŏn'chər)
n.
The dental specialty and practice of preventing and correcting irregularities of the teeth, as by the use of braces. Also called orthodontia.


or'tho·don'tic adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Snorkel mouthpieces feature an orthodontic design, with a snorkel splash guard
  and wide-bore breathing tube.
Repair of misaligned teeth or replacement of dental and orthodontic appliances
  may be recommended.
The recurring gesture of a hand reaching up to the mouth evokes not emotional
  desperation but severe orthodontic panic.
If orthodontic diagnosis has not been accomplished, recommendations should be
  made as necessary.
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