[meth-am-fet-uh-meen, -min]

noun Pharmacology.

a central nervous system stimulant, C10H15N, used clinically in the treatment of narcolepsy, hyperkinesia, and for blood pressure maintenance in hypotensive states: also widely used as an illicit drug.

Origin of methamphetamine

First recorded in 1945–50; meth- + amphetamine Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for methamphetamine

Contemporary Examples of methamphetamine

British Dictionary definitions for methamphetamine



a variety of amphetamine used for its stimulant action

Word Origin for methamphetamine

C20: from meth- + amphetamine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for methamphetamine

1949, from methyl + amphetamine; so called because it was a methyl derivative of amphetamine.

Online Etymology Dictionary, © 2010 Douglas Harper

methamphetamine in Science


[mĕth′ăm-fĕtə-mēn′, -mĭn]

An amine derivative of amphetamine, C10H15N, used in the form of its crystalline hydrochloride both as a central nervous system stimulant in the medical treatment of obesity and attention deficit hyperactivity disorder and illicitly as a recreational drug.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.