1
capitalized
: a genus of poisonous Eurasian herbs of the family Solanaceae that have a capsular fruit and include the henbane (H. niger)
2
: the dried leaves of the henbane containing the alkaloids hyoscyamine and scopolamine and used as an antispasmodic and sedative
Cite this Entry
“Hyoscyamus.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/hyoscyamus. Accessed 4 Nov. 2025.
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