"potassium cyanide." YourDictionary, n.d. Web. 15 September 2018. <http://www.yourdictionary.com/potassium-cyanide>.
potassium cyanide. (n.d.). Retrieved September 15th, 2018, from http://www.yourdictionary.com/potassium-cyanide
(inorganic chemistry) The potassium salt of hydrocyanic acid, KCN; the colourless crystals are soluble in water, and it is extremely poisonous, and is used in electroplating, the extraction of gold and silver from their ores, and in photography.
English Wiktionary. Available under CC-BY-SA license.