methionine

American

[me-thahy-uh-neen, -nin] / mɛˈθaɪ əˌnin, -nɪn /

noun

Biochemistry.

an amino acid, CH 3 SCH 2 CH 2 CH(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. Met; M

methionine British

/ -ˌnaɪn, mɛˈθaɪəˌniːn /

noun

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

"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

methionine Scientific

/ mə-thī′ə-nēn′ /

An essential amino acid. Chemical formula: C ₅ H ₁₁ NO ₂ S.
See more at amino acid

Etymology

Origin of methionine

First recorded in 1925–30; blend of methyl and thionine ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Their focus was on reducing two specific amino acids in food: methionine and cysteine.

From Science Daily

The body can also make cysteine by converting another amino acid, methionine, in the liver.

From Science Daily

To promote these reactions, alternative meat developers will add browning agents, including specific amino acids such as cysteine, methionine and lysine, sugars and the vitamin thiamin.

From Salon

Limiting the essential amino acid methionine appears to amplify the effects of radiation and chemotherapy in mice with colon cancer and sarcomas.

From Science Magazine

If farmers cannot use methionine, their thinking goes, industrial-style organic chicken farms will no longer be viable.

From Salon

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023