(redirected from phrenesis)
Also found in: Thesaurus, Medical.


1. Inflammation of the diaphragm.
2. Encephalitis. No longer in scientific use.

phre·nit′ic (-nĭt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(frɪˈnaɪtɪs) or


1. (Pathology) another name for encephalitis
2. (Pathology) a state of frenzy; delirium
[C17: via Late Latin from Greek: delirium, from phrēn mind, diaphragm +-itis]
phrenitic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.phrenitis - inflammation of the brain usually caused by a virusphrenitis - inflammation of the brain usually caused by a virus; symptoms include headache and neck pain and drowsiness and nausea and fever (`phrenitis' is no longer in scientific use)
inflammation, redness, rubor - a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat
acute hemorrhagic encephalitis - encephalitis that resembles apoplexy due to blood extravasation
equine encephalitis, equine encephalomyelitis - encephalitis caused by a virus that is transmitted by a mosquito from an infected horse
acute inclusion body encephalitis, herpes encephalitis, herpes simplex encephalitis - common form of acute encephalitis caused by herpes simplex 1; usually affects the temporal and frontal lobes
leukoencephalitis - inflammation of the white matter of the brain
cerebromeningitis, encephalomeningitis, meningoencephalitis - inflammation of the brain and spinal cord and their meninges
panencephalitis - diffuse inflammation of the entire brain
encephalitis lethargica, epidemic encephalitis, lethargic encephalitis, sleeping sickness, sleepy sickness - an encephalitis that was epidemic between 1915 and 1926; symptoms include paralysis of the extrinsic eye muscle and extreme muscular weakness
West Nile encephalitis - encephalitis caused by the West Nile virus; can be fatal in humans and horses and birds
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Permanent dementia is phrenesis or manifest madness; partial insanity is termed lunacy: