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derealization

[dee-ree-uh-luh-zey-shuh n]
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noun Psychiatry.
  1. an alteration in perception leading to the feeling that the reality of the world has been changed or lost.
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Origin of derealization

1940–45; de- + realization, orig. in the phrase feeling of derealization, as translation of German Entfremdungsgefühl (Freud)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
derealization in Medicine

derealization

(dē-rē′ə-lĭ-zā′shən)
n.
  1. The feeling that things in one's surroundings are strange, unreal, or somehow altered, as seen in schizophrenia.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.