| silicea | <zoology> Same as Silicoidea. Source: Websters Dictionary (01 Mar 1998) |
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| siliceous | Containing silica. (09 Oct 1997) |
| 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) |
| 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) |
| silicide | <chemistry> A binary compound of silicon, or one regarded as binary. <chemistry> Hydrogen silicide, a colourless, spontaneously inflammable gas, SiH4, produced artifically from silicon, and analogous to methane. Synonym: silico-methane, silicon hydride, and formerly siliciureted hydrogen. Source: Websters Dictionary (01 Mar 1998) |
| silicification | <chemistry> Thae act or process of combining or impregnating with silicon or silica; the state of being so combined or impregnated; as, the silicification of wood. See: Silicify. Source: Websters Dictionary (01 Mar 1998) |
| silicified | <chemistry> Combined or impregnated with silicon or silica, especially the latter; as, silicified wood. Source: Websters Dictionary (01 Mar 1998) |
| silicify | <chemistry> To convert into, or to impregnate with, silica, or with the compounds of silicon. "The specimens found . . . Are completely silicified." (Say) The silica may take the form of agate, chalcedony, flint, hornstone, or crystalline quartz. Origin: L. Silex, silicis, a flint + -fy: cf. F. Silicifier. Source: Websters Dictionary (01 Mar 1998) |
| silicioidea | <zoology> Same as Silicoidea. Source: Websters Dictionary (01 Mar 1998) |
| silicious | Containing silica. (09 Oct 1997) |
| silicispongiae | <zoology> Same as Silicoidea. Origin: NL. See Silex, and Sponge. Source: Websters Dictionary (01 Mar 1998) |
| siliciureted | <chemistry> Combined or impregnated with silicon. Siliciureted hydrogen. <chemistry> Hydrogen silicide. Origin: Written also siliciuretted. Source: Websters Dictionary (01 Mar 1998) |
| silicle | <botany> A seed vessel resembling a silique, but about as broad as it is long. See Silique. Origin: L. Silicula, dim. Of siliqua a pod or husk: cf. F. Silicule. Source: Websters Dictionary (01 Mar 1998) |
| silico- | <chemistry, prefix> A combining form (also used adjectively) denoting the presence of silicon or its compounds; as, silicobenzoic, silicofluoride, etc. (29 Oct 1998) |