Prussic
Pronunciation : Prus"sic
Part of Speech : a.
Etymology : [Cf. F. prussique.] (Old Chem.)
Definition : Defn: designating the acid now called hydrocyanic acid, but formerly called prussic acid, because Prussian blue is derived from it or its compounds. See Hydrocyanic.
Source : Webster's Unabridged Dictionary, 1913