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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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British Dictionary definitions for dopamines

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 dopamines

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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dopamines 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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dopamines 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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