n. [ Ferri- + prussiate. ] (Chem.) A ferricyanate; a ferricyanide. [ R. ] [ 1913 Webster ]

a. [ Ferri- + prussic. ] (Chem.) Ferricyanic. [ R. ] [ 1913 Webster ]

n. [ Ferro- + prussiate. ] (Chem.) A ferrocyanate; a ferocyanide. [ R. ] [ 1913 Webster ]

a. [ Ferro- + prussic. ] (Chem.) Ferrocyanic. [ 1913 Webster ]

a. [ Nitro- + prussic. ] (Chem.) Pertaining to, derived from, or designating, a complex acid called nitroprussic acid, obtained indirectly by the action of nitric acid on potassium ferrocyanide (yellow prussiate), as a red crystalline unstable substance. It forms salts called nitroprussides, which give a rich purple color with alkaline sulphides. [ 1913 Webster ]

n. See Nitroprussic. [ 1913 Webster ]

a. [ From Prussia, the country: cf. F. prussien. ] Of or pertaining to Prussia. -- n. A native or inhabitant of Prussia. [ 1913 Webster ]

Prussian blue (Chem.), any one of several complex double cyanides of ferrous and ferric iron; specifically, a dark blue amorphous substance having a coppery luster, obtained by adding a solution of potassium ferrocyanide (yellow prussiate of potash) to a ferric salt. It is used in dyeing, in ink, etc. Called also Williamson's blue, insoluble Prussian blue, Berlin blue, etc. --
Prussian carp (Zool.) See Gibel. --
Prussian green. (Chem.) Same as Berlin green, under Berlin. [ 1913 Webster ]

n. [ Cf. F. prussiate. ] (Chem.) A salt of prussic acid; a cyanide. [ 1913 Webster ]

Red prussiate of potash. See Potassium ferricyanide, under Ferricyanide. --
Yellow prussiate of potash. See Potassium ferrocyanide, under Ferrocyanide. [ 1913 Webster ]

a. [ Cf. F. prussique. ] (Old Chem.) designating the acid now called hydrocyanic acid, but formerly called prussic acid, because Prussian blue is derived from it or its compounds. See Hydrocyanic. [ 1913 Webster ]