a. [ Ferri- + cyanic. ] (Chem.) Pertaining to, or derived from, a ferricyanide. [ 1913 Webster ]

Ferricyanic acid (Chem.), a brown crystalline substance, H6(CN)12Fe2, obtained from potassium ferricyanide, and regarded as the type of the ferricyanides; -- called also hydro-ferricyanic acid, hydrogen ferricyanide, etc. [ 1913 Webster ]

n. [ Ferri- + cyanide. ] (Chem.) One of a complex series of double cyanides of ferric iron and some other base. [ 1913 Webster ]

Potassium ferricyanide (Chem.), red prussiate of potash; a dark, red, crystalline salt, K6(CN)12Fe2, consisting of the double cyanide of potassium and ferric iron. From it is derived the ferrous ferricyanate, Turnbull's blue. [ 1913 Webster ]