\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.