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]