GNU Collaborative International Dictionary of English

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1.       
   ‖Phrenitis , n. [L., fr. Gr. φρενῖτις, fr. φρήν, φρενός.]
   (Med.) Inflammation of the brain, or of the meninges of the brain, attended with acute fever and delirium; -- called also cephalitis.
   1913 Webster
   See Frenzy.
   1913 Webster