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narcolepsy

noun [U]
 
 
/ˈnɑː.kə.lep.si/ US  /ˈnɑːr.kə-/

Definition

a medical condition that makes you go to sleep suddenly and when you do not expect itDisorders of muscles and the nervous system narcoleptic
 
 
/ˌnɑː.kəˈlep.tɪk/ US  /ˌnɑːr.kə-/ noun [C], adjective
Disorders of muscles and the nervous system
(Definition of narcolepsy noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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