• synonyms


[ahr-juh-neen, -nahyn, -nin]
noun Biochemistry.
  1. an essential amino acid, C6H14N4O2: the free amino acid increases insulin secretion and is converted to urea in the liver by arginase. Abbreviation: Arg; Symbol: R
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Origin of arginine

First recorded in 1885–90, arginine is from the German word Arginin, a name unexplained by its originators
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for arginine

Historical Examples of arginine

  • In vertebrates, the basis for the phosphoric acid is creatine, whereas invertebrates have arginine instead.

    Smithsonian Institution - United States National Museum - Bulletin 240


British Dictionary definitions for arginine


  1. an essential amino acid of plant and animal proteins, necessary for nutrition and for the production of excretory urea
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Word Origin for arginine

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

arginine in Medicine


  1. An amino acid obtained from the hydrolysis or digestion of plant and animal protein.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

arginine in Science


  1. An amino acid that is essential for children but not for adults. Chemical formula: C6H14N4O2.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.