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methionine

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me⋅thi⋅o⋅nine

[me-thahy-uh-neen, -nin]
–noun Biochemistry.
an amino acid, CH3SCH2CH2CH(NH2)COOH, found in casein, wool, and other proteins or prepared synthetically: used as a supplement to a special diet in the prevention and treatment of certain liver diseases. Abbreviation: Met; Symbol: M

Origin:
1925–30; b. methyl and thionine
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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me·thi·o·nine   (mə-thī'ə-nēn')   
n.  A sulfur-containing essential amino acid, C5H11NO2S, obtained from various proteins or prepared synthetically and used as a dietary supplement and in pharmaceuticals.

[me(th)- + thion- + -ine2.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: me·thi·o·nine
Pronunciation: m&-'thI-&-"nEn
Function: noun
: a crystalline sulfur-containing essential amino acidC5H11NO2S that occurs in the L-form as a constituent of many proteins (as casein and egg albumin), that is important especially as a source ofsulfur for the biosynthesis of cysteine and as a source of methyl groups for transmethylation reactions (as in the biosynthesis of choline, creatine, and adrenaline), and that is used as a dietarysupplement for human beings and their domestic mammals and poultry and in the treatment of fatty infiltration of the liver —abbreviation Met;—see MEONINE
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

methionine me·thi·o·nine (mə-thī'ə-nēn')
n.
Abbr. Met
A sulfur-containing essential amino acid obtained from various proteins or prepared synthetically and used as a dietary supplement and in pharmaceuticals.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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