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
Main Entry: va·line Pronunciation: 'vA-"lEn, 'va-"lEn Function: noun : a crystalline essential amino acid C5H11NO2that occurs especially in fibrous proteins—abbreviation Val