arginine

noun

ar·​gi·​nine ˈär-jə-ˌnēn 

: a crystalline basic amino acid C₆H₁₄N₄O₂ derived from guanidine

Examples of arginine in a Sentence

Recent Examples on the Web

It’s made using three amino acids—arginine, glycine and methionine. — Jackie Flynn Mogensen, Scientific American, 7 July 2026

How Watermelon Juice Affects Blood Pressure Watermelon contains l-citrulline, an amino acid that your body converts into arginine. — Lindsey Desoto, Health, 22 June 2026

And Susie points to recent research that highlights how bone broth contains amino acids like glutamine, glycine, proline, histidine and arginine, which can collectively be helpful with immune function, tissue repair and muscle recovery. — Daryl Austin, USA Today, 6 June 2026

There’s also arginine/lysine polypeptide to help support firmness and elasticity. — Christa Joanna Lee, Allure, 16 May 2026

Word History

Etymology

German Arginin

First Known Use

1886, in the meaning defined above

Rhymes for arginine

• alkaline
• andesine
• anodyne
• anticline
• asinine
• benzidine
• borderline
• byzantine
• calamine
• caroline
• centerline
• chloroquine

Kids Definition

arginine

noun

ar·​gi·​nine ˈär-jə-ˌnēn 

: an amino acid that is found in various proteins

Medical Definition

arginine

noun

ar·​gi·​nine ˈär-jə-ˌnēn 

: a crystalline basic amino acid C₆H₁₄N₄O₂ derived from guanidine

—abbreviation Arg