dependence
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Related to physiological dependence: psychological dependence
dependence
[di′pen·dəns] (medicine)
Habituation to, abuse of, or addiction to a substance.
(statistics)
The existence of a relationship between frequencies obtained from two parts of an experiment which does not arise from the direct influence of the result of the first part on the chances of the second part but indirectly from the fact that both parts are subject to influences from a common outside factor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.