What is "metasilicic acid"

Metasilicic \Met`a*si*lic"ic\, a. [Pref. meta- + silicic.] (Chem.) Designating an acid derived from silicic acid by the removal of water; of or pertaining to such an acid.

Note: The salts of metasilicic acid are often called bisilicates, in mineralogy, as Wollastonite ( CaSiO3).

Metasilicic acid (Chem.), a gelatinous substance, or white amorphous powder, analogous to carbonic acid, and forming many stable salts.

n. (context chemistry English) An acid derived from silicic acid by the removal of water.