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A white or colorless crystalline solid, Ca(CN)2, used to kill insects and rodents and in the extraction of precious metals from ores. It may appear gray or black when impurities are present.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.