WordReference Random House Unabridged Dictionary of American English © 2026
ar•gi•nine
(är′jə nēn′, -nīn′, -nin),USA pronunciation n. [Biochem.]
- Biochemistryan essential amino acid, C6H14N4O2: the free amino acid increases insulin secretion and is converted to urea in the liver by arginase. Abbr.: Arg;
Symbol: R
- German Arginin, a name unexplained by its originators
- 1885–90
'arginine' also found in these entries (note: many are not synonyms or translations):