| a lemon-yellow, crystalline, water-soluble solid, K4Fe(CN)6·3H2O, used chiefly in casehardening alloys having an iron base and in dyeing wool and silk. |
| potassium ferrocyanide | |
noun | |
| a cyanide compound that is prepared by the reaction of potassium cyanide with ferrous salts; commonly used by gardeners |