ˈbärbəˌtȯl, ˈbȧb- sometimes -bəd. ə l or -bət ə l or bəˌtal noun
( -s )
Etymology: barbit uric + -al (as in Veronal )
: a white crystalline habit-forming hypnotic C 8 H 12 N 2 O 3 often administered in the form of its soluble sodium salt; diethyl-barbituric acid