| silicon dioxide | <chemical> Silica. Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, quartz, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid. Chemical name: Silica (12 Dec 1998) |
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| silicone | Any of many polymers made up of alternating oxygen and silicon atomscombined with other organic groups. Silicone can be an oil, grease, gelor plastic, but all forms are resistant to heat, water and will notconduct electricity. It is used for a huge number of uses in industry (lubricants, paints, adhesives, coolants, etc.) Silicone is used inmedicine to replace body parts, and its use in breast implants has comeunder fire because there is evidence that these appliances may leak, andfurther evidence that leaked silicone may cause autoimmune disorders. (09 Oct 1997) |
| silicone elastomers | Polymers of silicone having properties similar to those of vulcanised natural rubber, namely the ability to be stretched to at least twice their original length and to retract very rapidly to approximately their original length when released. (12 Dec 1998) |
| silicone implant | Implant composed of silicone; common form of breast implant for augmentation. (05 Mar 2000) |
| silicone oils | Organic siloxanes which are polymerised to the oily stage. The oils have low surface tension and density less than 1. They are used in industrial applications and in the treatment of retinal detachment, complicated by proliferative vitreoretinopathy. (12 Dec 1998) |
| silicones | Any organosiloxane polymer in which the structural unit is usually -r2si-o-, where r is a monovalent organic radical. Physical properties of silicones depend on the size and type of the radical (methyl, phenyl), the r:si ratio, and the molecular configuration of the polymer (linear, cyclic, degree of crosslinking). (12 Dec 1998) |
| siliconisation | Noncovalent coating of surface with a layer of silicone oil making it less adhesive or reactive. See: silanising. (18 Nov 1997) |
| silicoproteinosis | An acute pulmonary disorder, radiographically and histologically similar to pulmonary alveolar proteinosis, resulting from relatively short exposure to high concentrations of silica dust; pulmonary symptoms are of rapid onset and the condition is invariably fatal. (05 Mar 2000) |
| silicosiderosis | Silicosis due to inhalation of dust containing iron and silica. Synonym: silicosiderosis. Origin: sidero-+ silicosis (05 Mar 2000) |
| silicosis | Inflammation of the lung caused by foreign bodies (inhaled particles of silica): leads to fibrosis but unlike asbestosis does not predispose to neoplasia. (18 Nov 1997) |
| silicotic granuloma | Granulomatous nodule resulting from deposition of silica particles, usually occurring in lung. (05 Mar 2000) |
| silicotuberculosis | Tuberculosis of the silicotic lung. (12 Dec 1998) |
| silicotungstic | <chemistry> Of, pertaining to, or designating, any one of a series of double acids of silicon and tungsten, known in the free state, and also in their salts (called silicotungstates). Source: Websters Dictionary (01 Mar 1998) |
| silicula | A short siliqua, not more than twice as long as its width. (09 Oct 1997) |
| silicule | <botany> A silicle. Source: Websters Dictionary (01 Mar 1998) |
Synonyms : Silicoses
Synonyms : Silicotuberculoses
| silicic acid |
a jellylike substance (hydrated silica)
출처: wordnet.princeton.edu/perl/webwn
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| silicon |
Silicon is the chemical element in the periodic table that has the symbol Si and atomic number 14. A tetravalent metalloid, silicon is less reactive than its chemical analog carbon. It is the second most abundant element in the Earth's crust, making up 25.7% of it by weight. It occurs in clay, feldspar, granite, quartz and sand, mainly in the form of silicon dioxide (also known as silica) and silicates (compounds containing silicon, oxygen and metals). ...
출처: en.wikipedia.org/wiki/Silicon
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| silica gel |
Silica gel is a granular, porous form of silica made synthetically from sodium silicate. Despite the name, silica gel is a solid. It is usually distributed in the form of beads, which are packaged in a semi-permeable packet. It was created at Johns Hopkins University, Baltimore, Maryland in the 1920s. Its high porosity, around 800 m²/g, allows it to adsorb water readily, making it useful as a desiccant (drying agent). ...
출처: en.wikipedia.org/wiki/Silica_gel
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| silicone |
Silicones, or polysiloxanes, are inorganic polymers consisting of a silicon-oxygen backbone (...-Si-O-Si-O-Si-O-...) with side groups attached to the silicon atoms. Certain organic side groups can be used to link two or more of these -Si-O- backbones together. By varying the -Si-O- chain lengths, side groups, and crosslinking, silicones can be synthesized into a wide variety of materials. They can vary in consistency from liquid to gel to rubber to hard plastic. ...
출처: en.wikipedia.org/wiki/Silicone
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| silicone |
A synthetic gel that is used as an outer coating on breast implants and as the inside filling of some implants.
출처: www.stjude.org/glossary
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