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

 

pyorrhoea

 noun
(British English) (North American English pyorrhea) noun
BrE BrE//ˌpaɪəˈriə//
 
; NAmE NAmE//ˌpaɪəˈriə//
 
[uncountable] (medical)
 
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= periodontitis Word Origin early 19th cent.: from Greek puo- (from puon ‘pus’) + rhoia ‘flux’ (from rhein ‘to flow’).

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