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dopamine

[doh-puh-meen] /ˈdoʊ pəˌmin/
noun
1.
Biochemistry. a catecholamine neurotransmitter in the central nervous system, retina, and sympathetic ganglia, acting within the brain to help regulate movement and emotion: its depletion may cause Parkinson's disease.
Compare dopa.
2.
Pharmacology. a dopamine preparation used to increase the force of contraction of the heart in the treatment of shock.
Compare levodopa.
Origin
1955-1960
1955-60; see dopa, amine
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for dopamine
  • Exercise increases serotonin and dopamine production in the brain.
  • dopamine has been implicated in other addiction studies.
  • Thought to optimize levels of dopamine and norepinephrine, enhancing concentration and turning mundane tasks into wondrous ones.
  • Earlier research showed that nicotine stimulates the release of the neurotransmitter molecule dopamine in the brain.
  • Moreover, dopamine is particularly implicated in schizophrenia.
  • Novel or exciting pursuits also stimulate the brain to pump out more dopamine.
  • When it comes to a general genetic susceptibility, the leading suspect is a defect in the dopamine system, experts say.
  • Haloperidol, an antipsychotic drug, works by blocking dopamine receptors.
  • One prevailing view of addiction holds that alcohol and other drugs alter the way dopamine works in the brain.
  • Plainly put, it would mean one's behaviour is dictated by the extra dopamine secreted by a bug inherited from birth.
British Dictionary definitions for dopamine

dopamine

/ˈdɒpəmɪn/
noun
1.
a chemical found in the brain that acts as a neurotransmitter and is an intermediate compound in the synthesis of noradrenaline. Formula: (HO)2C6H3(CH2)2NH2
Word Origin
from d(ihydr)o(xy)p(henylethyl)amine
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
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Word Origin and History for dopamine

1959, from DOPA, the amino acid (from first letter of elements of dioxyphenylalanine), + -amine.

Online Etymology Dictionary, © 2010 Douglas Harper
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dopamine in Medicine

dopamine do·pa·mine (dō'pə-mēn')
n.
A monoamine neurotransmitter formed in the brain by the decarboxylation of dopa and essential to the normal functioning of the central nervous system. A reduction in its concentration within the brain is associated with Parkinson's disease. Also called 3-hydroxytyramine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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dopamine in Science
dopamine
  (dō'pə-mēn')   
A monoamine neurotransmitter that is formed during the synthesis of norepinephrine and is essential to the normal functioning of the central nervous system. A reduction of dopamine in the brain is associated with the development of Parkinson's disease. Chemical formula: C8H11NO2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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