Si·lic·ic a. Chem. Pertaining to, derived from, or resembling, silica; specifically, designating compounds of silicon; as, silicic acid.
Silicic acid Chem., an amorphous gelatinous substance, Si(HO)4, very unstable and easily dried to silica, but forming many stable salts; -- called also orthosilicic acid or normal silicic acid.
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