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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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Pathology) pathol a technical name for sleeping sickness2
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|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|
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