\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.