[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.

Nearby words

  1. methacrylic acid,
  2. methadon,
  3. methadone,
  4. methadone hydrochloride,
  5. methaemoglobin,
  6. methamphetamine hydrochloride,
  7. methanal,
  8. methanation,
  9. methane,
  10. methane series

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

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

Science definitions for methamphetamine


[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.