addiction

Science Dictionary
addiction   (ə-dĭk'shən)  Pronunciation Key 
  1. A physical or psychological need for a habit-forming substance, such as a drug or alcohol. In physical addiction, the body adapts to the substance being used and gradually requires increased amounts to reproduce the effects originally produced by smaller doses. See more at withdrawal.

  2. A habitual or compulsive involvement in an activity, such as gambling.


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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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