What is "metaboric acid"

n. (context inorganic compound English) Any of several oxyacids of boron having the general formula (HBO₂)_n.

Metaboric acid is the name for a family of inorganic compounds formed by the dehydration of boric acid. Metaboric acids are colourless solids with the empirical formula HBO. There are three forms of metaboric acid, all are white solids. One form of metaboric acid is molecule, and the other forms are polymers.