Webster’s Revised Unabridged Dictionary · 1913
Ferricyanide
Fer′ri·cy′a·nide, 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.