orthodontia

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Orthodontics.

from The Century Dictionary.

• noun That branch of dentistry which is concerned with the straightening of irregular teeth.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Med.) The treatment of the teeth so as to make the teeth align properly within the mouth, usually involving the wearing of braces and sometimes oral surgery.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun orthodontics

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the branch of dentistry dealing with the prevention or correction of irregularities of the teeth