sabadilla

sab·a·dil·la

noun \ˌsab-ə-ˈdil-ə, -ˈdē-(y)ə\

Definition of SABADILLA

: a Mexican plant (Schoenocaulon officinalis) of the lily family (Liliaceae); also : its seeds that are used as a source of veratrine and in insecticides and formerly in a preparation against external parasites (as head lice)