silica

sil·i·ca

S0405000 (sĭl′ĭ-kə)n. A white or colorless crystalline compound, SiO₂, which in the form of quartz and certain other minerals is a chief component of the earth's crust. Silica sand is used in making a wide variety of materials, such as glass and concrete.

[New Latin, from Latin silex, silic-, hard stone, flint.]

silica

(ˈsɪlɪkə) n1. (Elements & Compounds) the dioxide of silicon, occurring naturally as quartz, cristobalite, and tridymite. It is a refractory insoluble material used in the manufacture of glass, ceramics, and abrasives2. (Elements & Compounds) short for silica glass[C19: New Latin, from Latin: silex]

sil•i•ca

(ˈsɪl ɪ kə)

n. the dioxide form of silicon, SiO₂, occurring esp. as quartz sand, flint, and agate: used chiefly in the manufacture of glass, water glass, ceramics, and abrasives. [1795–1805; < New Latin, derivative of Latin silex hard stone, flint, boulder]

sil·i·ca

(sĭl′ĭ-kə) Silicon dioxide, SiO₂, a compound that occurs widely in rocks and mineral forms, such as quartz, sand, and flint, and is used to make glass, concrete, and other materials.

siliceous (sĭ-lĭsh′əs) adjective

Thesaurus

Noun

silica - a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelieritesilicon dioxide, silicon oxidecristobalite - a white mineral consisting of silica; found in volcanic rocksquartz - a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impuritieschert - variety of silica containing microcrystalline quartzflint - a hard kind of stone; a form of silica more opaque than chalcedonylechatelierite, quartz, quartz glass, vitreous silica, crystal - colorless glass made of almost pure silicaoxide - any compound of oxygen with another element or a radicalsilex - a pure form of finely ground silicatridymite - a mineral form of silica

Translations

silicesilice

silica

silicon dioxide,

chemical compound, SiO₂. It is insoluble in water, slightly soluble in alkalies, and soluble in dilute hydrofluoric acid. Pure silica is colorless to white. It occurs in several forms and is widely and abundantly distributed throughout the earth, both in the pure state and in silicatessilicate,
chemical compound containing silicon, oxygen, and one or more metals, e.g., aluminum, barium, beryllium, calcium, iron, magnesium, manganese, potassium, sodium, or zirconium. Silicates may be considered chemically as salts of the various silicic acids.
..... Click the link for more information. , e.g., in quartz (agate, amethyst, chalcedony, flint, jasper, onyx, and rock crystal), opal, sand, sandstone, clay, granite, and many other rocks; in skeletal parts of various protists and animals, such as certain sarcodines (see SarcodinaSarcodina,
the largest phylum (11,500 living species and 33,000 fossil species) of protozoans). It comprises the amebas and related organisms; which are all solitary cells that move and capture food by means of pseudopods, flowing temporary extensions of the cell.
..... Click the link for more information. ), diatomsdiatom
, unicellular organism of the kingdom Protista, characterized by a silica shell of often intricate and beautiful sculpturing. Most diatoms exist singly, although some join to form colonies.
..... Click the link for more information. , and spongessponge,
common name for members of the aquatic animal phylum Porifera, and for the dried, processed skeletons of certain species used to hold water. Over 4,500 living species are known; they are found throughout the world, especially in shallow temperate waters.
..... Click the link for more information. , and in the stems and other tissue of higher plants. Silica has many important uses. It is used as a filler for paint and rubber; in making ordinary glassglass,
hard substance, usually brittle and transparent, composed chiefly of silicates and an alkali fused at high temperature. Composition and Properties of Glass
..... Click the link for more information. ; in ceramics; in construction; and in the preparation of other substances, e.g., silicon carbidesilicon carbide,
chemical compound, SiC, that forms extremely hard, dark, iridescent crystals that are insoluble in water and other common solvents. Widely used as an abrasive, it is marketed under such familiar trade names as Carborundum and Crystolon.
..... Click the link for more information. . Fused quartz is pure amorphous silica; it is used in special chemical and optical apparatus. Because it has a low thermal coefficient of expansion, it withstands sudden changes in temperature and can be used in parts that are subjected to wide ranges of heat and cold. Unlike ordinary glass, it does not absorb infrared and ultraviolet light.

Silica

(silicon dioxide), SiO₂, a compound of silicon and oxygen. In the form of the mineral quartz and other varieties, silica constitutes about 12 percent of the mass of the earth’s crust. It is widely used in the silicate industry, particularly in the production of glass (quartz glass and other types of glass), ceramics, abrasives, concrete structures, and silicate brick. Radio technology and ultrasonic devices are important areas of application of quartz crystals. (For a more detailed discussion of silica, seeQUARTZ.)

silica

[′sil·ə·kə] (mineralogy) SiO₂ Naturally occurring silicon dioxide; occurs in five crystalline polymorphs (quartz, tridymite, cristobalite, coesite, and stishovite), in cryptocrystalline form (as chalcedony), in amorphous and hydrated forms (as opal), and combined in silicates.

silica, silicon dioxide

A white or colorless substance, nearly insoluble in water and in all acids except hydrofluoric; extremely hard; fuses to a colorless amorphous glass.

silica

the dioxide of silicon, occurring naturally as quartz, cristobalite, and tridymite. It is a refractory insoluble material used in the manufacture of glass, ceramics, and abrasives

silica

[sil´ĭ-kah] silicon dioxide, which occurs in nature as agate, amethyst, sand, quartz, chalcedony, cristobalite, and flint; it is one of the major constituents of dental porcelain, and in granular form serves as a dental abrasive and polishing agent. See also silicosis.

sil·i·ca

(sil'i-kă), The chief constituent of sand, hence of glass. Synonym(s): silicic anhydride, silicon dioxide [Mod. L. fr. L. silex (silic-), flint]

silica

Homeopathy
Silica, see there.
Toxicology
The highly fibrogenic mineral form of silicon, silicon dioxide.

Silica

Homeopathy
A homeopathic remedy prepared from quartz, which is used to stimulate the immune system and to treat abscesses, acne, athlete’s foot, breast cysts, earache, fractures, haemorrhoids, infections (colds, flu and otitis), insomnia, lymphadenopathy, periodontal disease, poor bone growth and sweating.

sil·i·ca

(sil'i-kă) The chief constituent of sand, hence of glass.
Synonym(s): silicon dioxide. [Mod. L. fr. L. silex (silic-), flint]

Silica

A substance (silicon dioxide) occurring in quartz sand, flint, and agate. It is used in making glass, scouring and grinding powders, pottery, etc.Mentioned in: Silicosis

sil·i·ca

(sil'i-kă) The chief constituent of sand, hence of glass.
Synonym(s): silicon dioxide. [Mod. L. fr. L. silex (silic-), flint]

silica

sil·i·ca

silica

sil•i•ca

sil·i·ca

silica

silica

silicon dioxide,

Silica

silica

silica, silicon dioxide

silica

silica

silica

sil·i·ca

silica

Silica

sil·i·ca

Silica

sil·i·ca

silica

Synonyms for silica

noun a white or colorless vitreous insoluble solid (SiO2)

Synonyms

Related Words