silica

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sil·i·ca

 (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)
n
1. (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 abrasives
2. (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
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.silica - a white or colorless vitreous insoluble solid (SiO2)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 lechatelierite
cristobalite - a white mineral consisting of silica; found in volcanic rocks
quartz - 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 impurities
chert - variety of silica containing microcrystalline quartz
flint - a hard kind of stone; a form of silica more opaque than chalcedony
lechatelierite, quartz, quartz glass, vitreous silica, crystal - colorless glass made of almost pure silica
oxide - any compound of oxygen with another element or a radical
silex - a pure form of finely ground silica
tridymite - a mineral form of silica
Translations

silica

[ˈsɪlɪkə] Nsílice f

silica

[ˈsɪlɪkə] nsilice fsilica gel ngel m de silice

silica

nKieselerde f

silica

[ˈsɪlɪkə] nsilice f

silica

n sílice m
References in periodicals archive ?
Al2O3, SiO2, CuCl, paraffin liquid and active carbon (denoted as AC) were all purchased from Tianjin Hengxing Chemical Reagent Co.
Nanoparticles of SiO2 with an average primary particle size of 50 nm with a corresponding surface area ranged from 200-600 m2 g-1 were purchased from the Nanotechnology Unit, Beni-Sueif University, Egypt.
SiO2, Al2O3 and CaO increases in DWPS was 21%, 66%, and 100% increased as compared to the composition of WPS samples
In cement making, the limestone containing more than 45 % calcium oxide is generally preferred, the impurities of, SiO2, Fe2O3, Al2O3 are ideal, whereas MgO constituent should be less than 2.
Trace elements exhibit a systematic relationship with Al2O3 and its concentration increase as grain size and SiO2 content decreases.
4 (8 mg) was purified by column chromatography (250 mg SiO2, 70-230 mesh; cyclohexane:aceton 95 : 5) to give compound 1 (1.
Se realizo un filtrado de los datos ya que estos no presentaban las mismas variables (elementos mayores) en todos los casos, lo que arrojo como resultado solo 135 datos, los cuales contienen las variables completas, en el caso del SiO2, Al2O3, MgO, K2O y Na2O.
Because of the small particle size, unsaturated bonds and hydroxy groups of different link states on the surface, the surface of nanometer SiO2 is of high energy and high polarity.
23% SiO2, low phosphorous and low sulphur content as well.
De ahi que el hallazgo de SiO2 en ese planeta, refuerza la idea de que Marte pudo haber estado habitado.
The predetermined weight percentages of the A1203 and the SiO2 are selected so that the alumina fiber sheet exhibits a scatter of basis weight with an upper limit of 7.
This is emerging as a critical issue, especially in low power products, such as mobile terminals, and it has spurred a search for thicker gate dielectric materials offering the same performance as SiO2.