Webster’s Revised Unabridged Dictionary · 1913
Phrenitis
Phre·ni′tis (frē·nī′tĭs), n. [L., fr. Gr. φρενῖτις, fr. φρήν, φρενός.] 1. (Med.) Inflammation of the brain, or of the meninges of the brain, attended with acute fever and delirium; — called also cephalitis.
2. See Frenzy.