addiction

Medical Dictionary

addiction ad·dic·tion (ə-dĭk'shən)
n.
Habitual psychological and physiological dependence on a substance or practice beyond one's voluntary control.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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