| silicic | <chemistry> Pertaining to, derived from, or resembling, silica; specifically, designating compounds of silicon; as, silicic acid. <chemistry> Silicic acid, an amorphous gelatinous substance, Si(HO)4, very unstable and easily dried to silica, but forming many stable salts. Synonym: orthosilicic, or normal silicic, acid. Origin: L. Silex, silicis, a flint: cf. F. Silicique. Source: Websters Dictionary (01 Mar 1998) |
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| silicic acid | <chemical> Silicic acid. Hydrated silicon dioxide that occurs in nature. It is insoluble in water or acids except hydrofluoric acid. Chemical name: Silicic acid (12 Dec 1998) |
| silicic anhydride | Fine particulate dust from quartz rock that is known to cause a progressive lung injury over long-term. See: pneumoconiosis. (27 Sep 1997) |