Webster's 1828 Dictionary
HYDROFLUORIC
a.[Gr. water. ] Consisting of fluorin and hydrogen. The hydrofluoric acid is obtained by distilling a mixture of one part of the purest fluor spar in fine powder, with two of sulphuric acid.
Webster's 1913 Dictionary
HYDROFLUORIC
Hy `dro *flu *or "ic, a. Etym: [Hydro-, 2 + fluoric. ] (Chem. )
Defn: 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.
New American Oxford Dictionary
hydrofluoric acid
hy dro fluor ic ac id |ˌhīdrəˌflo͝orik ˌhaɪdroʊˌflʊərɪk ˈæsəd | ▶noun Chemistry an acidic and extremely corrosive solution of the liquid hydrogen fluoride in water. [Chem. formula: HF. ]
Oxford Dictionary
hydrofluoric acid
hydrofluoric acid |ˌhʌɪdrə (ʊ )ˈflʊərɪk | ▶noun [ mass noun ] Chemistry an acidic, extremely corrosive solution of the liquid hydrogen fluoride in water. ●Chem. formula: HF.
The Wordsmith Dictionary