barbituric acid
noun
bar·bi·tu·ric acid ˌbär-bə-ˈt(y)u̇r-ik- 
: a synthetic crystalline acid C4H4N2O3 derived from pyrimidine
Word History
Etymology
partial translation of German Barbitursäure, irregular from the name Barbara + International Scientific Vocabulary uric + German Säure acid
First Known Use
1865, in the meaning defined above
Medical Definition
barbituric acid
noun
bar·bi·tu·ric acid ˌbär-bə-ˌt(y)u̇r-ik-
: a synthetic crystalline acid C4H4N2O3 that is a derivative of pyrimidine
also : any of its acid derivatives of which some are used as hypnotics