am·phet·a·mine

[am-fet-uh-meen, -min]
noun Pharmacology.
a racemic drug, C 9 H 13 N, that stimulates the central nervous system: used chiefly to lift the mood in depressive states and to control the appetite in cases of obesity.
Origin:
1935–40; a(lpha) + m(ethyl) + ph(enyl) + et(hyl) + amine

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
amphetamine (æmˈfɛtəˌmiːn, -mɪn) [Click for IPA pronunciation guide]
 
—n
a synthetic colourless volatile liquid used medicinally as the white crystalline sulphate, mainly for its stimulant action on the central nervous system, although it also stimulates the sympathetic nervous system. It can have unpleasant or dangerous side effects and drug dependence can occur; 1-phenyl-2-aminopropane. Formula: C6H5CH2CH(NH2)CH3
 
[C20: from a(lpha) + m(ethyl) + ph(enyl) + et(hyl) + -amine]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Amphetamine is always a great word to know.
So is bezoar. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
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Etymonline
Word Origin & History

amphetamine
1938, contracted from alphamethyl-phenethylamine.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

amphetamine am·phet·a·mine (ām-fět'ə-mēn', -mĭn)
n.

  1. A colorless, volatile liquid used primarily as a central nervous system stimulant.

  2. A derivative of amphetamine, such as dextroamphetamine or a phosphate or sulfate of amphetamine, used as a central nervous system stimulant in the treatment of certain conditions, such as narcolepsy and depression.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
amphetamine   (ām-fět'ə-mēn')  Pronunciation Key 
Any of a group of drugs that stimulate the central nervous system, resulting in elevated blood pressure, heart rate, and other metabolic functions. Amphetamines are used in the treatment of certain neurological conditions, such as attention deficit hyperactivity disorder and narcolepsy. The drugs are highly addictive and are sometimes abused.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

amphetamine definition


A drug that stimulates the central nervous system and is used to treat certain conditions, such as attention deficit disorder, depression, and narcolepsy.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Half received the real drug, and the others were given an amphetamine or a
  placebo.
As a bonus, one of those three also stimulated the production of antibodies
  against another widely used drug, amphetamine.
The confiscated spoon containing traces of amphetamine is declared forfeit.
Call it meth and you take out the stinger, because the harmful part is
  amphetamine.
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