Englishhydrocyanic acidnounMeaningA solution of hydrogen cyanide, HCN, in water; a weak poisonous acid, used as a fumigantRelated wordshydrogen cyanide(English)prussic acid(English)cyanic acid(English)hydrocyanate(English)hydrocyanide(English)sodium cyanide(English)cyanide(English)thiocyanic acid(English)SourcesDictionaryAPI.dev English dictionary data