Noun blue devil has 2 senses
  1. blueweed, blue devil, blue thistle, viper's bugloss, Echium vulgare - a coarse prickly European weed with spikes of blue flowers; naturalized in United States
    --1 is a kind of herb, herbaceous plant
    --1 is a member of Echium, genus Echium
  2. amobarbital sodium, blue, blue angel, blue devil, Amytal - the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
    --2 is a kind of amobarbital
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