staves·acre noun \ˈstāv-ˌzā-kər\
: a Eurasian plant of the genus Delphinium (D. staphisagria) having purple flowers
: 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
Seen & Heard
What made you want to look up stavesacre? Please tell us where you read or heard it (including the quote, if possible).