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[ahr-juh-neen, -nahyn, -nin] /ˈɑr dʒəˌnin, -ˌnaɪn, -nɪn/
noun, Biochemistry.
an essential amino acid, C 6 H 14 N 4 O 2 : the free amino acid increases insulin secretion and is converted to urea in the liver by arginase. Symbol: R.
Abbreviation: Arg;
Origin of arginine
1885-90; < German Arginin, a name unexplained by its originators Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for arginine


an essential amino acid of plant and animal proteins, necessary for nutrition and for the production of excretory urea
Word Origin
C19: from German Arginin, of uncertain origin
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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arginine in Medicine

arginine ar·gi·nine (är'jə-nēn')
Abbr. Arg
An amino acid obtained from the hydrolysis or digestion of plant and animal protein.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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arginine in Science
An amino acid that is essential for children but not for adults. Chemical formula: C6H14N4O2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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