jervina

from The Collaborative International Dictionary of English v.0.48

Jervine \Jer"vine\, n. [Prob. fr. Sp. yerba herb, OSp., the
   poison of the veratrum.] (Chem.)
   A poisonous alkaloid resembling veratrine, and found with it
   in white hellebore ({Veratrum album}); -- called also
   {jervina}.
   [1913 Webster]