Sabadilla n. : 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.

Example:
Does Sabadil work and is it safe?

Taxonomy
Sabadilla, veratrine, botanical, Veratrum, Herbal, The seeds, Liliaceae, sternutatory, cevadine, ointment, Synonym, officinalis, Constituents, Medicinal Action, Dosage, Schoenocaulon officinale, Europe, alkaloids.

Defination from the web:
... Medicinal Action and Uses---Sabadilla, or cevadilla, is an acrid, drastic emeto-cathartic, in overdoses capable of producing fatal results. ...