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Pertaining to, or derived from, the holly (Ilex), and allied plants; as, ilicic acid.

Pertaining to, or derived from, ferns; as, filicic acid.

Composed of, or derived from, silicon and fluorine. Fluosilicic acid, a double fluoride of hydrogen and silicon, H2F6Si, obtained in solution in water as a sour fuming liquid, and regarded as the type of the fluosilicates; -- called also silicofluoric acid, and hydrofluosilicic acid.

Pertaining to, or denoting, a compound consisting of a double fluoride of hydrogen and silicon; silicofluoric. See Silicofluoric.

Designating an acid derived from silicic acid by the removal of water; of or pertaining to such an acid.

Designating the form of silicic acid having the normal or highest number of hydroxyl groups.

Of or pertaining to compounds formed by the condensation of two or more molecules of silicic acid. Polysilicic acid (Chem.), any one of a series of acids formed by the condensation of two or more molecules of silicic acid, with elimination of water.

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, or normal silicic, acid.

Consisting of silica and calcareous matter.

A salt of metasilicic acid; -- so called because the ratio of the oxygen of the silica to the oxygen of the base is as two to one. The bisilicates include many of the most common and important minerals.

A double salt of boric and silicic acids, as in the natural minerals tourmaline, datolite, etc.

of silicon and some other (usually basic) element or radical, regarded as a salt of fluosilicic acid; -- called also silicofluoride.

A salt of metasilicic acid.

Of, pertaining to, or designating, an acid of titanium analogous to metasilicic acid.

A silicate formed with the lowest proportion of silicic acid, or having but one atom of silicon in the molecule.

2 as found in nature, constituting quarz, and most sands and sandstones. See Silica, and Silicic.

A salt of silicic acid.

oms capable of replacement by bases; quadribasic; -- said of certain acids; thus, normal silicic acid, Si(OH)4, is a tetrabasic acid.

A salt of orthosilicic acid, H4SiO4; -- so called because the ratio of the oxygen atoms united to the basic metals and silicon respectively is 1:1; for example, Mg2SiO4 or 2MgO.SiO2.

oxide; zirconic compounds. Zirconic acid, an acid of zirconium analogous to carbonic and silicic acids, known only in its salts.