stavesacre

noun
staves·​acre | \ˈstāv-ˌzā-kər \

Medical Definition of stavesacre 

1 : a Eurasian plant of the genus Delphinium (D. staphisagria) having purple flowers

2 : the ripe seeds of the stavesacre that contain delphinine, are violently emetic and carthartic, and have been used to kill head lice

called also staphisagria

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