phrenitis
/frɛˈnʌɪtɪs/ /frɪˈnʌɪtɪs/Medicine. Now historical
noun
Delirium, especially when associated with or attributed to inflammation of the brain; inflammation of the brain or of the meninges, encephalitis or meningitis.
Origin
Early 17th century; earliest use found in Robert Burton (1577–1640), writer. From classical Latin phrenītis delirium (2nd cent. a.d.) from ancient Greek ϕρενῖτις from ϕρεν-, ϕρήν mind + -ῖτις.