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.

&fist; 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.