Definition of "hydrocyanic" [hy•dro•cy•an•ic]

• Of or pertaining to hydrocyanic acid or its compounds (adjective)

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• "Fresh cassava roots contain a poisonous substance called hydrocyanic acid."
• "Under the proper conditions carbon unites with nitrogen and hydrogen to form the acid HCN, called hydrocyanic acid."
• "It was a medicine called the hydrocyanic or prussic acid."