Definition of amphetamine
: a racemic compound C9H13N or one of its derivatives (such as dextroamphetamine or methamphetamine) frequently abused as a stimulant of the central nervous system but used clinically especially as the sulfate or hydrochloride salt to treat hyperactive children and the symptoms of narcolepsy and as a short-term appetite suppressant in dieting
Recent Examples of amphetamine from the Web
Some of the failures were caused by illicit drug use, some by prescription drugs such as amphetamines.
The drugs for which tests are required are marijuana, cocaine, amphetamines, phencyclidine (PCP) and opiates.
Use of the drug is believed to be widespread in the Saudi kingdom and predates the Syrian conflict — in 2010 and 2011, the UNODC found the country to have the highest number of amphetamine seizures, most of which was Captagon.
Going back to the 1940s, researchers have exposed spiders to caffeine, amphetamines, LSD and other drugs, attracting plenty of media attention along the way.
The stimulant modafinil, a type of amphetamine, is given to U.S. Air Force pilots as a way to enhance alertness and cognition over long flights.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'amphetamine'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of amphetamine
International Scientific Vocabulary alpha + methyl + phen- + ethyl + amine
First Known Use: 1938See Words from the same year
AMPHETAMINE Defined for English Language Learners
Definition of amphetamine for English Language Learners
: a drug that causes the nervous system to become more active so that a person feels more energy and mental excitement
AMPHETAMINE Defined for Kids
Definition of amphetamine for Students
: a drug that makes the nervous system more active
Medical Definition of amphetamine
: a racemic sympathomimetic amine C9H13N or one of its derivatives (as dextroamphetamine or methamphetamine) that is a stimulant of the central nervous system, is frequently abused illicitly often leading to dependence, and is used clinically especially in the form of its sulfate C9H13N·H2SO4 to treat attention deficit disorder and narcolepsy and formerly as a short-term appetite suppressant—see adderall
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