Medical Dictionary

addiction

noun ad·dic·tion \ə-ˈdik-shən\

Definition of ADDICTION

:  compulsive physiological need for and use of a habit-forming substance (as heroin, nicotine, or alcohol) characterized by tolerance and by well-defined physiological symptoms upon withdrawal; broadly :  persistent compulsive use of a substance known by the user to be physically, psychologically, or socially harmful—compare habituation
March 30, 2015
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