SiHO4

Silicic Si*lic"ic, a. [L. silex, silicis, a flint: cf. F. silicique.] (Chem.) Pertaining to, derived from, or resembling, silica; specifically, designating compounds of silicon; as, silicic acid. [1913 Webster]

{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}. [1913 Webster]