- a colorless, highly poisonous liquid, HCN, an aqueous solution of hydrogen cyanide.
Origin of hydrocyanic acid
First recorded in 1810–20
Also called prussic acid.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for hydrocyanic acid
- another name for hydrogen cyanide, esp when in aqueous solution
- An aqueous solution of hydrogen cyanide that is a poisonous weak acid.prussic acid
- An aqueous solution of hydrogen cyanide, having a characteristic smell of bitter almonds. Also called prussic acid
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