noun Biochemistry.
- an essential amino acid, (CH3)2CHCH(NH2)COOH, white, crystalline, and water-soluble, present in most plant and animal proteins, required for growth. Abbreviation: Val; Symbol: V
noun
- an essential amino acid; a component of proteins
n.
- An essential amino acid that is a constituent of proteins, especially fibrous proteins.
- An essential amino acid. Chemical formula: C5H11NO2. See more at amino acid.