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

 

diphtheria

 noun
noun
BrE BrE//dɪfˈθɪəriə//
 
; NAmE NAmE//dɪfˈθɪriə//
 
, NAmE//dɪpˈθɪriə//
 
[uncountable]
 
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a serious infectious disease of the throat that causes difficulty in breathing Parents are advised to have their children immunized against diphtheria. Word Origin mid 19th cent.: modern Latin, from French diphthérie (earlier diphthérite), from Greek diphthera ‘skin, hide’.
See the Oxford Advanced American Dictionary entry: diphtheria