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

 

amenorrhoea

 noun
(British English) (North American English amenorrhea) noun
BrE BrE//əˌmenəˈriːə//
 
; NAmE NAmE//eɪˌmenəˈriːə//
 
[uncountable] (medical)
 
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a condition in which an adult woman does not menstruate (= there is no flow of blood from her womb every month) Word Origin early 19th cent.: from a- ‘without’ + menorrhoea.