From Longman Dictionary of Contemporary Englishprussic acidprus‧sic ac‧id /ˌprʌsɪk ˈæsɪd/ noun [uncountable] HCa very poisonous acid
Examples from the Corpus
prussic acid• But amygdalin reacts with an enzyme in the almond to produce glucose and two very characteristic compounds, benzaldehyde and prussic acid.• There was arsenic, cyanide, prussic acid and - the list stopped there.• The Kamikaze: One part liquid helium, two parts prussic acid.Origin prussic acid (1700-1800) French prussique “Prussian”; because it was first obtained from Prussian blue, a coloring material 