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Medical Dictionary

habituation

Pronunciation (ha-bit′chū-ā′shŭn)
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  1. The process of forming a habit, referring generally to psychological dependence on the continued use of a drug to maintain a sense of well-being, which can result in drug addiction.
  2. The method by which the nervous system reduces or inhibits responsiveness during repeated stimulation.

WebMD Medical Reference from "Stedman's Medical Dictionary"

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