the act of habituating.
the condition of being habituated.
physiological tolerance to or psychological dependence on a drug, short of addiction.
reduction of psychological or behavioral response occurring when a specific stimulus occurs repeatedly.

1400–50; late Middle English. See habituate, -ion

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World English Dictionary
habituation (həˌbɪtjʊˈeɪʃən)
1.  the act or process of habituating
2.  psychol Compare extinction the temporary waning of an innate response that occurs when it is elicited many times in succession

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American Heritage
Medical Dictionary

habituation ha·bit·u·a·tion (hə-bĭch'ōō-ā'shən)

  1. The process of habituating or the state of being habituated.

  2. Physiological tolerance to a drug resulting from repeated use.

  3. Psychological dependence on a drug.

  4. The decline of a conditioned response following repeated exposure to the conditioned stimulus.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
habituation   (hə-bĭch'-ā'shən)  Pronunciation Key 
  1. The gradual decline of a response to a stimulus resulting from repeated exposure to the stimulus.

  2. Physiological tolerance for a drug resulting from repeated use.

  3. Psychological dependence on a drug resulting from repeated use.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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