/val"een, -in, vay"leen, -lin/ , n. Biochem.
an essential amino acid, (CH 3 ) 2 CHCH(NH 2 )COOH, white, crystalline, and water-soluble, present in most plant and animal proteins, required for growth. Abbr.: Val; Symbol: V
[ 1910-15; VAL(ERIC) + -INE 2 ]