One of the mysteries of the English language finally explained.
A mildly toxic alkaloid present in the seed capsules of the corn poppy.
Mid 19th century (in an earlier sense). From French rhoeadine from Hellenistic Greek ῥοιαδ-, ῥοιάς corn poppy + French -ine, after scientific Latin rhoeas, specific epithet (Linnaeus Species plantarum I. 507).
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