death's herb en · NOUN
Meanings
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(archaic, uncountable) The deadly nightshade.
The Deadly Nightshade, popularly called the “Death's Herb,” is one of the most poisonous of our wild flowers, and from its stupefying qualities it has been termed “Dwale.”
1881 July 2, “Flower Lore: July”, in Gardeners Chronicle & New Horticulturist, page 6: