English

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

 

mastectomy

 noun
noun
BrE BrE//mæˈstektəmi//
 
; NAmE NAmE//mæˈstektəmi//
 
(pl. mastectomies)
 
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a medical operation to remove a person’s breast Word Origin 1920s: from Greek mastos ‘breast’ + -ectomy.
See the Oxford Advanced American Dictionary entry: mastectomy