One of the mysteries of the English language finally explained.
Of fluorine and boron; chiefly in "fluoboric acid"noun (originally) boron trifluoride, BF₃, a corrosive gas with Lewis acid properties, made by the action of hydrofluoric acid on boron oxides; (now) the acid HBF₄, obtained by dissolving boron trifluoride in water.
Early 19th century; earliest use found in Edinburgh Monthly Magazine. From fluo- + boric (although this is apparently first attested slightly later), after French fluoborique.
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