methionine

noun Biochemistry.

1. 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

noun

1. an essential amino acid containing sulphur, which occurs in many proteins: important in methylating reactions

n.

1. A sulfur-containing essential amino acid obtained from various proteins or prepared synthetically and used as a dietary supplement and in pharmaceuticals.

1. An essential amino acid. Chemical formula: C5H11NO2S. See more at amino acid.