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psychotic

[sahy-kot-ik] /saɪˈkɒt ɪk/
adjective
1.
2.
Psychiatry. of or relating to psychosis: psychotic symptoms;
psychotic delusion.
3.
(loosely) mentally unstable:
The man who threw a stone through the convenience store window must be psychotic.
4.
intensely upset, anxious, or angry; crazy:
My dad gets so psychotic when I come home even a little bit late.
noun
5.
Psychiatry. a person afflicted with psychosis.
6.
(loosely) someone who is mentally unstable:
I always cross the street when I have to go past that homeless shelter; it's full of psychotics.
Synonyms: nut, kook, cuckoo, loony, loon.
7.
someone who exhibits extreme emotion or behavior:
My brother turns into a complete psychotic whenever his team loses.
Synonyms: lunatic, maniac, psycho.
Origin of psychotic
1885
1885-85; psych(osis) + -otic
Related forms
psychotically, adverb
nonpsychotic, adjective
semipsychotic, adjective
unpsychotic, adjective
Can be confused
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for psychotic

psychotic

/saɪˈkɒtɪk/
adjective
1.
of, relating to, or characterized by psychosis
noun
2.
a person experiencing psychosis
Derived Forms
psychotically, adverb
Usage note
It is preferable to talk about a person experiencing psychosis rather than a psychotic, which reduces a person's individuality
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
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Word Origin and History for psychotic
adj.

1889, coined from psychosis, on the model of neurotic/neurosis, from Greek psykhe- "mind, soul" (see psyche).

n.

"a psychotic person," 1901, from psychotic (adj.).

Online Etymology Dictionary, © 2010 Douglas Harper
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psychotic in Medicine

psychotic psy·chot·ic (sī-kŏt'ĭk)
adj.
Of, relating to, or affected by psychosis. n.
A person affected by psychosis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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psychotic in Science
psychosis
  (sī-kō'sĭs)   
Plural psychoses (sī-kō'sēz)
A mental state caused by psychiatric or organic illness, characterized by a loss of contact with reality and an inability to think rationally. A psychotic person often behaves inappropriately and is incapable of normal social functioning.

psychotic adjective (sī-kŏt'ĭk)
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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