Definition of henbane
: a poisonous fetid Eurasian herb (Hyoscyamus niger) of the nightshade family with yellowish-brown flowers and sticky hairy leaves that yield hyoscyamine and scopolamine
First Known Use of henbane
Medical Definition of henbane
: a poisonous fetid Old World herb of the genus Hyoscyamus (H. niger) that has sticky hairy dentate leaves and yellowish brown flowers, contains the alkaloids hyoscyamine and scopolamine, and is the source of hyoscyamus—called also black henbane, insane root
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