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hydrocyanic acid

American  

noun

  1. a colorless, highly poisonous liquid, HCN, an aqueous solution of hydrogen cyanide.


hydrocyanic acid British  
/ ˌhaɪdrəʊsaɪˈænɪk /

noun

  1. another name for hydrogen cyanide, esp when in aqueous solution

"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

hydrocyanic acid Scientific  
/ hī′drō-sī-ăn′ĭk /
  1. An aqueous solution of hydrogen cyanide, having a characteristic smell of bitter almonds.

  2. Also called prussic acid


Etymology

Origin of hydrocyanic acid

First recorded in 1810–20


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The researchers also demonstrated that their laser can effectively detect hydrogen cyanide gas in the air, a substance commonly referred to as "hydrocyanic acid."

From Science Daily ● Oct. 19, 2025

The French started using hydrocyanic acid in 1916 and put over 4,000 tons.

From Time Magazine Archive

They found that hydrocyanic acid, simply standing in water, gives rise to urea and other substances found in living tissues.

From Time Magazine Archive

Systemic toxics, a small group of gases of which the principal member is hydrocyanic acid, kill by paralyzing the central nervous system.

From Time Magazine Archive

The peach contains also a very small amount of hydrocyanic acid, which is more liberally present in the kernel than in the fruit.

From Human Foods and Their Nutritive Value by Harry Snyder

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