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potassium cyanide

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noun Chemistry.
  1. a white, granular, water-soluble, poisonous powder, KCN, having a faint almondlike odor, used chiefly in metallurgy and photography.
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Origin of potassium cyanide

First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for potassium cyanide

potassium cyanide

noun
  1. a white poisonous granular soluble solid substance used in photography and in extracting gold from its ores. Formula: KCN
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012