meth·am·phet·amine .meth-am-'fet-ə-.mēn, .meth-əm-, -mən n an amine C10H15N that is used medically in the form of its crystalline hydrochloride C10H15N·HCl esp. to treat attention deficit disorder and obesity and that is often abused illicitly as a stimulant called also meth, methedrine, methylamphetamine, speed
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meth·am·phet·amine (meth″am-fetґə-mēn) a sympathomimetic amine closely related chemically to both amphetamine and ephedrine, having actions similar to those of amphetamine. Abuse of this drug may lead to dependence; see amphetamine (def. 1).Medical dictionary. 2011.