Helleborein
Pronunciation : Hel`le*bo"re*in
Part of Speech : n.
Definition : Defn: A poisonous glucoside accompanying helleborin in several species of hellebore, and extracted as a white crystalline substance with a bittersweet taste. It has a strong action on the heart, resembling digitalin.
(Chem.)
Source : Webster's Unabridged Dictionary, 1913