barbital
noun
bar·bi·tal ˈbär-bə-ˌtȯl 
: a crystalline barbiturate C8H12N2O3 used as a sedative and hypnotic often in the form of its soluble sodium salt
Word History
Etymology
barbituric + -al (as in Veronal, trademark for barbital)
First Known Use
1917, in the meaning defined above
Medical Definition
barbital
noun
bar·bi·tal ˈbär-bə-ˌtȯl, -ˌtal
: a crystalline barbiturate C8H12N2O3 formerly used as a sedative and hypnotic often in the form of its soluble sodium salt see veronal