a. (Chem.) A salt of malonic acid. [ 1913 Webster ]
a. (Chem.) Pertaining to, or designating, a dicarboxylic acid produced artifically as a white crystalline substance,
n. [ Malonic + -yl. ] (Chem.) A divalent diacyl radical,
n. A white crystalline acid derived from pyrimidine; it is used in preparing barbiturate drugs.