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A sulfur-containing essential amino acid, C5H11NO2S, obtained from various proteins or prepared synthetically and used as a dietary supplement and in pharmaceuticals.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Elements & Compounds) an essential amino acid containing sulphur, which occurs in many proteins: important in methylating reactions
[C20: meth- + thionine]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
me•thi•o•nine(mɛˈθaɪ əˌnin, -nɪn)
an essential amino acid, C5H11NO2S, occurring in casein, yeast, and other proteins. Abbr.: Met; Symbol: M
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
An essential amino acid. See more at amino acid.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||methionine - a crystalline amino acid containing sulfur; found in most proteins and essential for nutrition|
essential amino acid - an amino acid that is required by animals but that they cannot synthesize; must be supplied in the diet
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English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.