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Results found in several dictionaries: Medical, Collaborative Dictionary
absence épileptique   n f absentia epileptica

Collaborative Dictionary     French-English
à défaut de réponse satisfaisante adj. in the absence of a satisfactory reply Reverso General Dictionary 
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'absence épileptique' also found in translations in English-French dictionary
have epilepsy vt. être épileptique Reverso General Dictionary 

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