The American Heritage® Dictionary of the English Language, 4th Edition
n. An amino acid, C6H13N3O3, originally isolated from watermelon, that is produced as an intermediate in the conversion of ornithine to arginine during urea formation in the liver.
n. An amino acid, first isolated from watermelons, that is an intermediate in the urea cycle
the GNU version of the Collaborative International Dictionary of English
n. an amino acid that is an intermediate in the conversion of ornithine to arginine.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an amino acid that does not occur in proteins but is an intermediate in the conversion of ornithine to arginine
Word Usage
"Another amino acid, L-citrulline, known as citrulline, has been researched for its potential benefits as a workout recovery supplement and to help boost immunity after exercise."