barbituric acid

noun

1. a white, crystalline, slightly water-soluble powder, C4H4N2O3, used chiefly in the synthesis of barbiturates.

noun

1. a white crystalline solid used in the preparation of barbiturate drugs. Formula: C 4 H 4 N 2 O 3Systematic name: 2,4,6-trioxypyrimidine Also called: malonylurea

n.

1. An organic acid used in the manufacture of barbiturates.