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abnormal psychology

noun
  1. the branch of psychology that deals with modes of behavior, mental phenomena, etc., that deviate markedly from the standards believed to characterize a well-adjusted personality.
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Origin of abnormal psychology

First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for abnormal psychology

abnormal psychology

noun
  1. the study of behaviour patterns that diverge widely from generally accepted norms, esp those of a pathological nature
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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

abnormal psychology in Medicine

abnormal psychology

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