The Collaborative International Dictionary of English v.0.48:

Sabadilla \Sab`a*dil"la\ (s[a^]b`[.a]*d[i^]l"l[.a]), n. [Sp.
   cebadilla.] (Bot.)
   A Mexican liliaceous plant (Schoenocaulon officinale);
   also, its seeds, which contain the alkaloid veratrine. It
   was formerly used in medicine as an emetic and purgative.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Veratrine \Ve*ra"trine\ (?; 277), n. [Cf. F. v['e]ratrine. See
   Veratrum.] (Chem.)
   A poisonous alkaloid obtained from the root of hellebore
   (Veratrum) and from sabadilla seeds as a white crystalline
   powder, having an acrid, burning taste. It is sometimes used
   externally, as in ointments, in the local treatment of
   neuralgia and rheumatism. Called also veratria, and
   veratrina.
   [1913 Webster]