noun
fatal familial insomnia; FFI
A rare inherited prion disease causing progressive insomnia and neurodegeneration. Used in medical contexts.
致死性家族性不眠症はプリオン病の一種です。
Fatal familial insomnia is a type of prion disease.
A compound of 致死性 (fatal), 家族性 (familial), and 不眠症 (insomnia), directly translating the English medical term 'fatal familial insomnia'.