narcolepsy
Concise Oxford English Dictionary © 2008 Oxford University Press:
narcolepsy /ˈnɑːkə(ʊ)lɛpsi/
▶noun Medicine a condition characterized by an extreme tendency to fall asleep.
– derivatives
narcoleptic adjective & noun.
narcoleptic adjective & noun.
– origin C19: from Gk narkē ‘numbness’, on the pattern of epilepsy.
'narcolepsy' also found in these Oxford entries:

