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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.
Contemporary Examples

How come in the amphetamine rush of the 1980s nobody worried about the sanctity of baseball?
Clemens Prosecutors Strike Out Buzz Bissinger July 14, 2011

Chemically speaking, Molly is an amphetamine with a twist of phenethylamine (a hallucinogen).
Molly: The Dangerous Drug That’s Too Good to Quit Abby Haglage September 7, 2013

The chemicals in ‘bath salts’ seem to be cousins of the amphetamine agents that debuted as crystal meth.
What ‘Bath Salts’ Will—and Won’t—Make You Do Kent Sepkowitz May 31, 2012

When I was around 14-ish, I was put on amphetamine therapy for ADHD.
‘My Drug Story,’ Entry 1 Justin Green January 8, 2013

Historical Examples

An amphetamine injection creates a sudden increase in blood pressure that can result in stroke, very high fever, or heart failure.
What Works: Schools Without Drugs United States Department of Education

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

1938, contracted from alphamethyl-phenethylamine.

amphetamine am·phet·a·mine (ām-fět’ə-mēn’, -mĭn)

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

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.

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.

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


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  • Amphi-

    a prefix occurring in loanwords from Greek (amphibious); on this model, used with the meaning “two,” “both,” “on both sides,” in the formation of compound words: amphiaster. prefix on both sides; at both ends; of both kinds: amphipod, amphitrichous, amphibious around: amphibole before a vowel amph-, word-forming element from Greek amphi- “both, of both kinds, […]

  • Amphiaraus

    a hero who joined the Seven against Thebes, although he knew that his death was fated: deified after death. Historical Examples The prophet Amphiaraus this, O my mistress, and with him the victims, the libations of the earth delighting in blood. The Tragedies of Euripides, Volume I. Euripides I hold as a myth that Amphiaraus […]

  • Amphiarthrodial

    a joint permitting only slight motion, as that between the vertebrae. noun (pl) -ses (-siːz) (anatomy) a type of articulation permitting only slight movement, as between the vertebrae of the backbone amphiarthrosis am·phi·ar·thro·sis (ām’fē-är-thrō’sĭs) n. See movable joint. am’phi·ar·thro’di·al (-thrō’dē-əl) adj.

  • Amphiarthroses

    a joint permitting only slight motion, as that between the vertebrae. Historical Examples The former is one of the amphiarthroses or half-joints by which the sacrum is bound to the ilium. Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 5 Various noun (pl) -ses (-siːz) (anatomy) a type of articulation permitting only slight movement, as between […]

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