| Hydrofluoric | a. [ Hydro-, 2 + fluoric. ] (Chem.) Pertaining to, or containing, hydrogen and fluorine; fluohydric; as, hydrofluoric acid. [ 1913 Webster ]
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. [ 1913 Webster ]
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| Silicofluoric | a. (Chem.) Containing, or composed of, silicon and fluorine; especially, denoting the compounds called silicofluorides. [ 1913 Webster ]
Silicofluoric acid (Chem.), a compound of hydrofluoric acid and silicon fluoride, known only in watery solution. It is produced by the action of silicon fluoride on water, and is regarded as an acid, H2SiF6, and the type and origin of the silicofluorides. [ 1913 Webster ]
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