Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A white or colorless crystalline compound, SiO2, occurring abundantly as quartz, sand, flint, agate, and many other minerals and used to manufacture a wide variety of materials, especially glass and concrete.
from The Century Dictionary.
- noun Silicon dioxid (SiO2), or silicic anhydrid, a white or colorless substance, nearly insoluble in water and in all acids except hydrofluoric acid.
- noun Silica fused by the oxyhydrogen blowpipe may be worked in the plastic state, very much as glass is, and retains its amorphous character on cooling. Extremely delicate threads of this material may be drawn, and are used to suspend minute, readily mobile mirrors or other such parts of physical apparatus; they are also valuable as electrical insulators, being less affected by atmospheric moisture than threads of glass. Tubes, flasks, and beakers of moderate size have also been made from fused silica, and are useful on account of the hardness of the material, the high temperature it will bear without melting, the rapid changes of temperature it will sustain without cracking, and its superior resistance to most chemical reagents. Its behavior as respects dilatation by heat is also important. Berthelot has, however, recently shown that it is permeable by gases, particularly at high temperatures.
- noun Same as
siliqua , 6.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) Silicon dioxide, SiO�. It constitutes ordinary quartz (also opal and tridymite), and is artifically prepared as a very fine, white, tasteless, inodorous powder.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun
Silicon dioxide . - noun Any of the
silica group of thesilicate minerals.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun 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
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Grasses have a gritty compound called silica, which is contained in sand and is used to make glass.
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And not too surprisingly (since silica is the most abundant mineral in the Earth’s crust), the coating is non-toxic and environmentally harmless.
Spray-on liquid glass ewillett 2010
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And not too surprisingly (since silica is the most abundant mineral in the Earth’s crust), the coating is non-toxic and environmentally harmless.
Spray-on liquid glass ewillett 2010
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It is from the silicone family, which originates from silica, which is found in granite, quartz and sand.
Robert Tornambe, M.D.: What's In That Cream You're Putting On Your Face? M.D. Robert Tornambe 2011
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It is from the silicone family, which originates from silica, which is found in granite, quartz and sand.
Robert Tornambe, M.D.: What's In That Cream You're Putting On Your Face? M.D. Robert Tornambe 2011
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The ash also in high in silica, which is extremely abrasive, and can lead to excessive wear on the animals 'tooth enamel.
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Aerogels can be made out of many different substances, including silicon dioxide (also called silica), carbon and even egg albumen, though silica aerogels are among the most common.
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Aerogels can be made out of many different substances, including silicon dioxide (also called silica), carbon and even egg albumen, though silica aerogels are among the most common.
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Aerogels can be made out of many different substances, including silicon dioxide (also called silica), carbon and even egg albumen, though silica aerogels are among the most common.
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Many pastes also contain silica, which is a drying agent.
Simple Skin Beauty Ellen Marmur 2009
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