silicic, a. [L. silex, silicis, a flint: cf. F. silicique.].
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.