Webster’s Revised Unabridged Dictionary · 1913
Prussiate
Prus′si·ate (prŭs′sĭ·āt or prys′·, or prŭsh′ĭ·āt; 277), n. [Cf. F. prussiate.] (Chem.) A salt of prussic acid; a cyanide.
Red prussiate of potash. See Potassium ferricyanide, under Ferricyanide. — Yellow prussiate of potash. See Potassium ferrocyanide, under Ferrocyanide.