\Hy`dro*flu*or"ic\, a. [Hydro-, 2 + fluoric.]
(Chem.)
Pertaining to, or containing, hydrogen and fluorine;
fluohydric; as, hydrofluoric acid.
{Hydrofluoric acid} (Chem.), a colorless, mobile, volatile
   liquid, {HF}, very corrosive in its action, and having a
   strong, pungent, suffocating odor. It is produced by the
   action of sulphuric acid on fluorite, and is usually
   collected as a solution in water. It attacks all
   silicates, as glass or porcelain, is the agent employed in
   etching glass, and is preserved only in vessels of
   platinum, lead, caoutchouc, or gutta-percha.