Definition of periodontitis noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌperiədɒnˈtaɪtɪs//
; NAmE NAmE//ˌperiədɑːnˈtaɪtɪs//
(British English also pyorrhoea)(North American English also pyorrhea)[uncountable](medical)
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a condition in which the area around the teeth becomes sore and swollen, which may make the teeth fall out
See the Oxford Advanced American Dictionary entry: periodontitis