Ferricyanide \Fer`ri*cy"a*nide\ (?; 104), n. [Ferri- + cyanide.]

(Chem.) One of a complex series of double cyanides of ferric iron and some other base.

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.

Source: Webster's Revised Unabridged Dictionary (1913)