Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of silica is as below...

Crater :: Crater (n.) The basinlike opening or mouth of a volcano, through which the chief eruption comes; similarly, the mouth of a geyser, about which a cone of silica is often built up..

Saponite :: Saponite (n.) A hydrous silicate of magnesia and alumina. It occurs in soft, soapy, amorphous masses, filling veins in serpentine and cavities in trap rock..

Apophyllite :: Apophyllite (n.) A mineral relating to the zeolites, usually occurring in square prisms or octahedrons with pearly luster on the cleavage surface. It is a hydrous silicate of calcium and potassium..

Hisingerite :: Hisingerite (n.) A soft black, iron ore, nearly earthy, a hydrous silicate of iron..

Metasilicate :: Metasilicate (n.) A salt of metasilicic acid.

Phlogopite :: Phlogopite (n.) A kind of mica having generally a peculiar bronze-red or copperlike color and a pearly luster. It is a silicate of aluminia, with magnesia, potash, and some fluorine. It is characteristic of crystalline limestone or dolomite and serpentine. See Mica..

Cerolite :: Cerolite (n.) A hydrous silicate of magnesium, allied to serpentine, occurring in waxlike masses of a yellow or greenish color..

Brewsterite :: Brewsterite (n.) A rare zeolitic mineral occurring in white monoclinic crystals with pearly luster. It is a hydrous silicate of aluminia, baryta, and strontia..

Harmotome :: Harmotome (n.) A hydrous silicate of alumina and baryta, occurring usually in white cruciform crystals; cross-stone..

Gymnite :: Gymnite (n.) A hydrous silicate of magnesia.

Frett :: Frett (n.) A vitreous compound, used by potters in glazing, consisting of lime, silica, borax, lead, and soda..

Potassium :: Potassium (n.) An Alkali element, occurring abundantly but always combined, as in the chloride, sulphate, carbonate, or silicate, in the minerals sylvite, kainite, orthoclase, muscovite, etc. Atomic weight 39.0. Symbol K (Kalium)..

Strata :: Strass (n.) A brilliant glass, used in the manufacture of artificial paste gems, which consists essentially of a complex borosilicate of lead and potassium. Cf. Glass..

Cronstedtite :: Cronstedtite (n.) A mineral consisting principally of silicate of iron, and crystallizing in hexagonal prisms with perfect basal cleavage; -- so named from the Swedish mineralogist Cronstedt..

Hauynite :: Hauynite (n.) A blue isometric mineral, characteristic of some volcani/ rocks. It is a silicate of alumina, lime, and soda, with sulphate of lime..

Datolite :: Datolite (n.) A borosilicate of lime commonly occuring in glassy,, greenish crystals..

Beryl :: Beryl (n.) A mineral of great hardness, and, when transparent, of much beauty. It occurs in hexagonal prisms, commonly of a green or bluish green color, but also yellow, pink, and white. It is a silicate of aluminium and glucinum (beryllium). The aquamarine is a transparent, sea-green variety used as a gem. The emerald is another variety highly prized in jewelry, and distinguished by its deep color, which is probably due to the presence of a little oxide of chromium..

Hematinon :: Hematinon (n.) A red consisting of silica, borax, and soda, fused with oxide of copper and iron, and used in enamels, mosaics, etc..

Basic :: Basic (a.) Said of crystalline rocks which contain a relatively low percentage of silica, as basalt..

Tridymite :: Tridymite (n.) Pure silica, like quartz, but crystallizing in hexagonal tables. It is found in trachyte and similar rocks..

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