citrulline cit·rul·line (sĭt'rə-lēn')
n.
An amino acid produced as an intermediate in the conversion of ornithine to arginine during urea formation in the liver.
| citrulline (sĭt'rə-lēn') Pronunciation Key
An amino acid originally isolated from watermelon, occurring mostly in the liver as an intermediate in the conversion of ornithine to arginine during urea formation. Chemical formula: C6H13N3O3. |