detumescence
noun/ˌdiːtjuːˈmesns/
/ˌdiːtuːˈmesns/
[uncountable] (formal)- a slow reduction in swelling (= the condition of being larger than normal), especially in a penis that was in a state of sexual excitementWord Originlate 17th cent.: from Latin detumescere, from de- ‘down, away’+ tumescere ‘to swell’.
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detumescence