metasilicic

a. [ Pref. meta- + silicic. ] (Chem.) Designating an acid derived from silicic acid by the removal of water; of or pertaining to such an acid. [ 1913 Webster ]

☞ The salts of metasilicic acid are often called bisilicates, in mineralogy, as Wollastonite (CaSiO3). [ 1913 Webster ]

Metasilicic acid (Chem.), a gelatinous substance, or white amorphous powder, analogous to carbonic acid, and forming many stable salts. [ 1913 Webster ]