Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
A viral epidemic encephalitis marked by apathy, paralysis of the extrinsic eye muscle, and extreme muscular weakness. It occurred in various parts of the world between 1915 and 1926. Also called sleeping sickness.
[New Latin encephalītis lēthargica : encephalītis, encephalitis + Latin lēthargica, feminine of lēthargicus, sleepy.]
(Pathology) pathol a technical name for sleeping sickness2
Switch to new thesaurus
|Noun||1.||encephalitis lethargica - an encephalitis that was epidemic between 1915 and 1926; symptoms include paralysis of the extrinsic eye muscle and extreme muscular weakness|