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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Hydrofluoric \Hy'dro*flu*or"ic\, adjective [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.
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