blue devil

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Noun1.blue devil - a coarse prickly European weed with spikes of blue flowersblue devil - a coarse prickly European weed with spikes of blue flowers; naturalized in United States
herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
Echium, genus Echium - a genus of bristly herbs and shrubs of the family Boraginaceae
2.blue devil - the sodium salt of amobarbital that is used as a barbiturateblue devil - the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
amobarbital - a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant