noun Pathology. (formerly)

inflammation of the brain; encephalitis.
delirium; frenzy.

Origin of phrenitis

1615–25; < Late Latin phrenītis delirium, frenzy < Greek phrenîtis. See phren-, -itis Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for phrenitis

Historical Examples of phrenitis

British Dictionary definitions for phrenitis


noun rare

another name for encephalitis
a state of frenzy; delirium
Derived Formsphrenitic (frɪˈnɪtɪk), adjective

Word Origin for phrenitis

C17: via Late Latin from Greek: delirium, from phrēn mind, diaphragm + -itis
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

phrenitis in Medicine




Inflammation of the diaphragm.
Encephalitis. No longer in technical use.
Related formsphre•nitic (-nĭtĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.