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Definition of Multiple personality disorder

Multiple personality disorder: Also known as dissociative identity disorder. A neurosis in which the personality becomes dissociated into two or more distinct parts each of which becomes dominant and controls behavior from time to time to the exclusion of the other parts.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=20573
Last Editorial Review: 10/30/2013

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