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

 

detumescence

 noun
noun
BrE BrE//ˌdiːtjuːˈmesns//
 
; NAmE NAmE//ˌdiːtuːˈmesns//
 
[uncountable](formal)
 
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a gradual reduction in swelling, especially in a penis that was in a state of sexual excitement Word Origin late 17th cent.: from Latin detumescere, from de- ‘down, away’+ tumescere ‘to swell’.