blue devil

Noun

• the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic

• a coarse prickly European weed with spikes of blue flowers; naturalized in United States

Related words

• Synonyms: 
  amobarbital sodium , blue , blue angel , Amytal , blueweed , blue thistle , viper's bugloss , Echium vulgare