Noah Webster
Phrenitis
PHREN'ITIS, noun [Gr. from the mind; Latin animus, animosus, and the Teutonic mod; Eng. mood.]
1. In medicine, an inflammation of the brain, or of the meninges of the brain, attended with acute fever and delirium.
2. Madness, or partial madness; delirium; phrenzy. [It is generally written in English, phrensy or frenzy.