noun
narcolepsy
Medical term for a chronic sleep disorder characterized by sudden sleep attacks.
睡眠発作は日中に突然強い眠気に襲われる病気です。
Narcolepsy is a condition where one is suddenly overcome by intense sleepiness during the day.
Katakana loanword for narcolepsy, used in medical contexts but less common than 睡眠発作 in Japanese medical literature.
Compound of 睡眠 (sleep) and 発作 (attack/seizure), directly describing the symptom of sudden sleep attacks.