encephalitis lethargica

noun

sleepy sickness

Similar
sleeping sicknesssleepy sicknessepidemic encephalitislethargic encephalitis
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

nounencephalitis lethargica (uncountable)
  1. uncountablesleepy sickness

Synonyms & antonyms

nounan encephalitis that was epidemic between 1915 and 1926; symptoms include paralysis of the extrinsic eye muscle and extreme muscular weakness

Similar
sleeping sicknesssleepy sicknessepidemic encephalitislethargic encephalitis
Broader
encephalitiscephalitisphrenitis
Also see
sleeping sicknesssleepy sickness

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry
APA

encephalitis lethargica. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/encephalitis%20lethargica

MLA

“encephalitis lethargica.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/encephalitis%20lethargica. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “encephalitis lethargica,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/encephalitis%20lethargica.

Source: encephalitis lethargica on Wiktionary, CC BY-SA 4.0.