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[per-ee-uh-don-shuh m, -shee-uh m] /ˌpɛr i əˈdɒn ʃəm, -ʃi əm/
noun, plural periodontia
[per-ee-uh-don-shuh, -shee-uh] /ˌpɛr i əˈdɒn ʃə, -ʃi ə/ (Show IPA)
the bone, connective tissue, and gum surrounding and supporting a tooth.
Also, parodontium.
Origin of periodontium
From New Latin, dating back to 1955-60; See origin at peri-, -odont, -ium


[per-ee-uh-don-tiks] /ˌpɛr i əˈdɒn tɪks/
noun, (used with a singular verb)
the branch of dentistry dealing with the study and treatment of diseases of the periodontium.
Also, periodontia
[per-ee-uh-don-shuh, -shee-uh] /ˌpɛr i əˈdɒn ʃə, -ʃi ə/ (Show IPA)
1945-50; < New Latin periodont(ia) (see peri-, -odont, -ia) + -ics
Related forms
periodontic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for periodontia


(functioning as sing) the branch of dentistry concerned with diseases affecting the tissues and structures that surround teeth Also called periodontology
Derived Forms
periodontic, adjective
periodontically, adverb
Word Origin
C19: from peri- + -odontics, from Greek odōn tooth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for periodontia



1948, from periodontia (1914; see periodontal) + -ics. Periodontic (adj.) is attested by 1889.



1828; see periodontal.

Online Etymology Dictionary, © 2010 Douglas Harper
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periodontia in Medicine

periodontics per·i·o·don·tics (pěr'ē-ə-dŏn'tĭks)
The branch of dentistry concerned with the care and treatment of the tissues surrounding and supporting the teeth. Also called periodontia.

per'i·o·don'tic or per'i·o·don'ti·cal adj.

periodontium per·i·o·don·ti·um (pěr'ē-ə-dŏn'shē-əm)
n. pl. per·i·o·don·ti·a (-shē-ə, -shə)
The tissues that surround and support the teeth, including the gums, cementum, periodontal ligament, and alveolar and supporting bone. Also called alveolodental membrane, peridental membrane.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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periodontia in Science
The branch of dentistry that deals with the study and treatment of the tissues surrounding and supporting the teeth, especially the gums.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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