n. [ Cf. F. vératrine. 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 ]