of, pertaining to, or affected with psychopathy.

1840–50; psychopath(y) + -ic

nonpsychopathic, adjective
unpsychopathic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
psychopath (ˈsaɪkəʊˌpæθ)
Also called: sociopath a person afflicted with a personality disorder characterized by a tendency to commit antisocial and sometimes violent acts and a failure to feel guilt for such acts

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1847, from Ger. psychopatisch, from Gk. psykhe- "mind" (see psyche) + pathos "suffering" (see pathos). Psychopath (n.) is an 1885 back-formation.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

psychopathic psy·cho·path·ic (sī'kə-pāth'ĭk)

  1. Of, relating to, or characterized by psychopathy.

  2. Relating to or affected with an antisocial personality disorder that is usually characterized by aggressive, perverted, criminal, or amoral behavior.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The main message of the film is that, through their psychopathic pursuit of
  profit, firms make good people do bad things.
We have all run into the types who were born self-centered, greedy or even
We need to stop the psychopathic egomaniac who thinks he's special.
Many serious crimes are committed by offenders with psychopathic personalities.
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