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[per-ee-oh-don-tahy-tis] /ˌpɛr i oʊ dɒnˈtaɪ tɪs/
noun, Dentistry.
inflammation of the periodontium caused by bacteria that infect the roots of teeth and the surrounding gum crevices, producing bleeding, pus formation, and gradual loss of bone and the tissues that support the teeth.
Compare pyorrhea (def 2).
Origin of periodontitis
First recorded in 1870-75; periodont(ium) + -itis Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Word Origin and History for periodontitis

1842; see periodontal + -itis.

Online Etymology Dictionary, © 2010 Douglas Harper
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periodontitis in Medicine

periodontitis per·i·o·don·ti·tis (pěr'ē-ō'dŏn-tī'tĭs)
Disease of the periodontium characterized by inflammation of the gums, resorption of the alveolar bone, and degeneration of the periodontal 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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