methionine

[me-thahy-uh-neen, -nin] /mɛˈθaɪ əˌnin, -nɪn/
noun, Biochemistry
1.
an amino acid, CH 3 SCH 2 CH 2 CH(NH 2)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. Symbol: M.
Abbreviation: Met;
Origin
1925-30; blend of methyl and thionine
Examples from the web for methionine
  • Methyl mercaptan is also used to make methionine, an amino acid which may be deficient in the diet.
British Dictionary definitions for methionine

methionine

/mɛˈθaɪəˌniːn; -ˌnaɪn/
noun
1.
an essential amino acid containing sulphur, which occurs in many proteins: important in methylating reactions
Word Origin
C20: meth- + thionine
methionine in Medicine

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.

methionine in Science
methionine
  (mə-thī'ə-nēn')   
An essential amino acid. Chemical formula: C5H11NO2S. See more at amino acid.