The Collaborative International Dictionary
Barbituric acid
Barbituric acid \Bar`bi*tu"ric ac"id\ (Chem.) A white, crystalline substance, CH2(CO.NH)2.CO, derived from alloxantin, also from malonic acid and urea, and regarded as a substituted urea.
Wiktionary
barbituric acid
n. (context organic compound English) A heterocyclic compound derived from pyrimidine that is the basis of all barbiturate drugs.
WordNet
barbituric acid
n. a white crystalline acid derived from pyrimidine; used in preparing barbiturate drugs [syn: malonylurea]
Usage examples of "barbituric acid".
It was a technical tome, one on medinals, the monosodium salts of diethyl-barbituric acid.
It was expected this would calm her down, but barbituric acid derivatives affect individuals differently.