"Siliceous" is a word in ENGLISH

Containing a high percentage of silica; -- opposed to basic.

A kind of plastic cement, or artificial stone, consisting chiefly of magnesia and silica; -- called also albolite.

Said of crystalline rocks which contain a relatively low percentage of silica, as basalt.

A salt of metasilicic acid; -- so called because the ratio of the oxygen of the silica to the oxygen …

A mineral occurring in hexagonal crystals, also massive, generally of a yellow color, containing silica, alumina, lime, soda, and carbon …

Highly carbonized iron, the direct product of the blast furnace; -- used for making castings, and for conversion into wrought …

A mineral, composed of silica, magnesia, and iron, of a yellow to green color. It is common in certain volcanic …

The basinlike opening or mouth of a volcano, through which the chief eruption comes; similarly, the mouth of a geyser, …

A sort of stone, found in the mines with the true alum rock, chiefly of silica and iron.

A soft, heavy, brilliant glass, consisting essentially of a silicate of lead and potassium. It is used for tableware, and …

A vitreous compound, used by potters in glazing, consisting of lime, silica, borax, lead, and soda.

A loose hydrated form of silica, a variety of opal, deposited in concretionary cauliflowerlike masses, around some hot springs and …

A hard, brittle, translucent, and commonly transparent substance, white or colored, having a conchoidal fracture, and made by fusing together …

A rare metallic element, of a silver white color, and low specific gravity (2.1), resembling magnesium. It never occurs naturally …

A mineral of a yellowish color, consisting chiefly of silica, glucina, manganese, and iron, with a little sulphur.

A red consisting of silica, borax, and soda, fused with oxide of copper and iron, and used in enamels, mosaics, …

A mineral of a brownish black color, related to titanite in form. It consists chiefly of silica, titanium dioxide, lime, …

A mineral related to the micas, but low in silica and yielding brittle folia with pearly luster.

A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity.

A division of Radiolaria including numerous minute marine species. The skeleton is composed of silica, and is often very elegant …