Met·a·si·lic·ic a.  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.
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