encephalitis lethargica

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Definitions of encephalitis lethargica words

noun encephalitis lethargica a form of encephalitis, or sleeping sickness, epidemic in the period from 1915 to 1926 0
noun encephalitis lethargica sleepy sickness. 0

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A common word. It’s meaning is known to most children of preschool age. About 91% of English native speakers know the meaning and use the word.

Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".

This diagram is provided by Google Ngram Viewer

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