Veneficial
Pronunciation : Ven`e*fi"cial, Ven`e*fi"cious
Part of Speech : a.
Definition : Defn: Acting by poison; used in poisoning or in sorcery. [Obs.] "An old veneficious practice." Sir T. Browne. -- Ven`e*fi"cious*ly, adv. [Obs.]
Source : Webster's Unabridged Dictionary, 1913