blue devil Meaning, Definition & Usage
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noun a coarse prickly European weed with spikes of blue flowers; naturalized in United States
viper's bugloss; blue thistle; Echium vulgare; blueweed.
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noun the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
blue; blue angel; Amytal; amobarbital sodium.
