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obsessive-compulsive disorder

noun
1.
(psychiatry) an anxiety disorder in which patients are driven to repeat the same act, such as washing their hands, over and over again, usually for many hours OCD
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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obsessive-compulsive disorder in Science
obsessive-compulsive disorder
  (əb-sěs'ĭv-kəm-pŭl'sĭv)   
A psychiatric disorder characterized by the persistent intrusion of repetitive, unwanted thoughts which may be accompanied by compulsive actions, such as handwashing. The individual cannot voluntarily prevent these thoughts or actions, which interfere with normal functioning.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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