a colorless corrosive fuming usually gaseous compound HF that yields hydrofluoric acid when dissolved in water, vesiniku ja fluori ühend, valem HF; vees hästilahustuv mürgine gaas (lahuses esineb peamiselt dimeeridena H2F2)

an acidic, extremely corrosive solution of the liquid hydrogen fluoride in water, keskmise tugevusega mürgine hape, mis tekib vesinikfluoriidi lahustumisel vees

a colorless corrosive fuming usually gaseous compound HF that yields hydrofluoric acid when dissolved in water, vesiniku ja fluori ühend, valem HF; vees hästilahustuv mürgine gaas (lahuses esineb peamiselt dimeeridena H2F2)