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paranoid

[par-uh-noid] /ˈpær əˌnɔɪd/
adjective
1.
of, like, or suffering from paranoia.
noun
2.
a person suffering from paranoia.
Also, paranoiac
[par-uh-noi-ak, -ik] /ˌpær əˈnɔɪ æk, -ɪk/ (Show IPA),
paranoeac
[par-uh-nee-ak, -ik] /ˌpær əˈni æk, -ɪk/ (Show IPA)
.
Origin
1900-1905
1900-05; paranoi(a) + -oid, with base and suffix merged, perhaps by haplology from the expected *paranoioid
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for paranoiac
  • The writer is officially diagnosed as a paranoiac schizophrenic, potentially dangerous.
  • Even this is a little cavalier for the true paranoiac, who avoids die in a handler because the system is out to get you.
British Dictionary definitions for paranoiac

paranoid

/ˈpærəˌnɔɪd/
adjective
1.
of, characterized by, or resembling paranoia
2.
(informal) exhibiting undue suspicion, fear of persecution, etc
noun
3.
a person who shows the behaviour patterns associated with paranoia
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 paranoiac

1892 (n. and adj.), from paranoia on model of maniac, etc.

paranoid

adj.

1901, irregularly formed from paranoia + -oid. As a noun, "a paranoid person," attested from 1922.

Online Etymology Dictionary, © 2010 Douglas Harper
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paranoiac in Medicine

paranoiac par·a·noi·ac (pār'ə-noi'āk', -noi'ĭk)
n.
A paranoid. adj.
Of, relating to, or resembling paranoia.

paranoid par·a·noid (pār'ə-noid')
adj.
Relating to, characteristic of, or affected with paranoia. n.
One affected with paranoia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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