Silhouette A silhouette is a view of an object or scene consisting of the outline and a featureless interior. The term comes from Etienne de Silhouette, a finance minister of Louis XV of France who practiced the art of silhouette papercutting.
	Silica gel Silica gel is a granular, porous form of silica made synthetically from sodium silicate. Despite the name, silica gel is a solid. Silica gel is most commonly encountered in everyday life as of beads packed in a semipermeable membrane plastic. In this form, it is used as a desiccant to control the local humidity in order to avoid spoilage.
	Silicic acid Silicic acid is a general name for a family of chemical compounds of silicon, hydrogen, and oxygen, with the general formula [SiOx(OH)4-2x]n. Some simple silicic acids have been identified in very dilute aqueous solution, such as metasilicic acid, orthosilicic acid, disilicic acid, and pyrosilicic acid; however in the solid state these probably condense to form polymeric silicic acids of complex structure.
	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 mass.
	Silicon carbide | Silicon carbide |- | align="center" colspan="2" | |- ! | General |- | Other names | |- | Chemical formula | SiC |- | Molar mass | 40.097 g/mol |- | Appearance | black-green odorless powder |- | CAS registry number | [409-21-2] |- ! | Properties |- | Density and Phase
	Silicon Valley Silicon Valley is the South Bay of the San Francisco Bay Area in Northern California California in the United States. The term originally referred to the region's large number of Integrated circuit innovators and manufacturers, but eventually came to refer to all the high tech businesses in the area.
	Silicone Silicones, or polysiloxanes, are inorganic-organic polymers with the chemical formula [R2SiO]n, where R = organic groups such as methyl, ethyl, and phenyl. These materials consist of an inorganic silicon-oxygen backbone with organic side groups attached to the silicon atoms, which are four-coordinate.
	Silicone resin Silicone resins are a type of silicone material which is formed by branched, cage-like oligosiloxanes with the general formula of RnSiXmOy, where R is a non reactive substituent, usually Methyl or Phenyl, and X is a functional group Hydrogen, Hydroxyl group, Chlorine or Alkoxy group.
	Siliqua The siliqua is the modern name given to small, thin, Roman silver coins produced from 4th century and later. The term siliqua comes from the siliqua graeca, the seed of the carob tree, which in the Ancient Roman weights and measures is equivalent to 1/6 of a scruple.
	Silk Silk is a natural protein fibre that can be weaving into textiles. It is obtained from the cocoon of silkworm larvae reared in captivity . The shimmering appearance for which silk is prized comes from the fibres' triangular prism-like structure which allows silk cloth to refract incoming light at different angles.
	Silk Road The Silk Road or Silk Route was an interconnected series of routes through Southern Asia traversed by Camel train and ocean vessel, and connecting Chang'an , China, with Antioch, Asia Minor, as well as other points. It extends over 8,000 km . Its influence carried over into Japan and Korea.
	Silk Stockings Silk Stockings was a 1954 musical composed by Cole Porter, to a stageplay by George Kaufman, Leueen McGrath and Abe Burrows that was in turn based upon the 1939 film Ninotchka, Melchior Lengyel's romantic fable about the seductive charms of capitalism and one particular capitalist that warm the heart of a dedicated apparatchik, directed by Ernst Lubitsch and starring Greta Garbo,
	Silkwood Silkwood is a 1983 film which tells the true story of Karen Silkwood, who died under suspicious circumstances while investigating wrongdoings at the Kerr-McGee plutonium plant where she worked. It stars Meryl Streep in the title role, as well as Kurt Russell, Cher, Craig T. Nelson, David Strathairn, Bruce McGill, Diana Scarwid, Ron Silver, Susie Bond and Fred Ward.
	Silky Anteater Silky Anteater or Pygmy Anteater is a species of anteater from Central America and South America ranging from extreme southern Mexico south to Brazil and, possibly, Paraguay. It is the only species in the Cyclopes genus and the Cyclopedidae family.
	Silphium Silphium was a plant of the genus Ferula. Generally considered to be an extinct "giant fennel", it once formed the crux of trade from the ancient city of Cyrene, Libya for its use as a rich seasoning and as a medicine. It was so critical to the Cyrenian economy that most of their coins bore a picture of the plant.
	Silphium laciniatum Silphium laciniatum is a species of flowering plant in the genus rosinweed. It is native to east-central North America, from southern Ontario and New York south to Alabama and west across the prairies to North Dakota and Colorado south to Texas.
	Silt Silt is soil or rock derived granular material of a specific grain size.
	Siltstone Siltstone is a Geology term for a sedimentary rock whose composition is intermediate in grain size between the coarser sandstone and the finer mudstone.
	Silver Silver is a chemical element with the symbol Ag . A soft white lustrous transition metal, it has the highest electrical and thermal conductivity of any metal and occurs in minerals and in free form. This metal is used in coins, jewelry, tableware, photography, and in mirrors.
	Silver Ash Silver Ash is China's first visual kei band. They formed in the year 2000 and are located in Beijing. They combine a mix of visual kei, glam rock, and goth rock. The original line-up included Ling, Lucy, Nancy, Hong, and Zhen. They are similar to Dir en grey, Radiohead, X-Japan, and Malice Mizer.
	Silver Birch Silver Birch is a widespread European birch, though in southern Europe it is only found at higher altitudes. Its range extends into southwest Asia in the mountains of northern Turkey and the Caucasus. The closely related Siberian Silver Birch in northern Asia and Sichuan Birch of central Asia are also treated as varieties of Silver Birch by some botanists, as B.
	Silver bromide Silver bromide, a soft, pale-yellow, insoluble salt well known for its unusual photosensitive. This property has allowed silver halides to become the basis of modern photographic materials. Greenwood, N.N., Earnshaw, A. Chemistry of the Elements. New York: Permagon Press.
	Silver Bullet A silver bullet is, in fiction, a method to kill magical creatures, such as werewolf. It is also a metaphor for straightforward solution of extreme effectiveness. Silver Bullet is the name for: * Silver Bullet, a 1985 American film based on a Stephen King novella
	Silver Certificate Silver Certificates were used for a time in the United States as a form of paper currency. They were produced in response to silver agitation by citizens angered by the "Crime of 1873", which placed the United States on the gold standard. The certificate was matched to the same amount of value in silver coinage.
	Silver chloride Silver chloride chloride) is a chemical compound with chemical formula AgCl and is composed of one silver and one chlorine atom. Silver chloride is a white crystal solid, one of the few metal chlorides insoluble in water. It is soluble, however, in solutions containing the halide ions, thiosulfate ions, or aqueous ammonia, reacting to form complexes according to the following reactions:
	Silver Fir Silver Fir or European Silver Fir is a fir native to the mountains of Europe, from the Pyrenees north to Normandy, east to the Alps and the Carpathians, and south to southern Italy and northern Serbia, where it intergrades with the closely related Bulgarian Fir.
	Silver Fox Silver Fox is a fictional mutant character in the Marvel Comics Marvel Universe.
	Silver hake The silver hake, Atlantic hake or New England hake,, is a merluccid hake of the genus Merluccius, found in the north west Atlantic Ocean from Maryland to the Grand Bankss, at depths of between 55 and 900 metres. Its length is about 30 in.
	Silver iodide | Silver iodide |- | align="center" colspan="2" | |- ! | General |- | Other names | Silver(I) iodide |- | Chemical formula | AgI |- | Molar mass | 234.773 g/mol |- | Appearance | yellow, crystalline solid |- | CAS registry number | [7783-96-2] |- ! | Properties
	Silver Lining Silver Lining is an album by Bonnie Raitt, released in 2002.
	Silver Maple The Silver Maple is a species of maple native to the eastern United States and adjacent parts of southeast Canada. It is a relatively fast-growing tree, commonly reaching a height of 20-30 m, exceptionally 35 m. It is often found along waterways and in wetlands, leading to the colloquial name "Water Maple".
	Silver nitrate | List of R-phrases | , |- | List of S-phrases | , , ,, |- Silver nitrate is a chemical compound with chemical formula silverNitrogenOxygen3. This nitrate of silver is a light-sensitive ingredient in photographic film and is a poisonous, corrosive compound.
	Silver Spoons Silver Spoons was a sitcom that aired on NBC from September 25, 1982 to May 11, 1986 and in first-run syndication from September 15, 1986 to March 4, 1987. The series was produced by Embassy Television for the first four seasons, until Columbia Pictures Television took production of the series when it moved to syndication.
	Silver Star The Silver Star is the fourth highest Awards and decorations of the United States military that can be awarded to a member of the United States Armed Forces, and the third highest given for wiktionary:valor .
	Silverfish Lepisma saccharina is a small, wingless insect. Its common name derives from the animal's silvery grey colour, combined with the fish-like appearance of its movements, while the scientific name indicates the silverfish's diet of carbohydrates such as sugar or starches.
	Silversmith A silversmith is a person who works with silver. Silversmiths not only work with silver, but with other metals as well to make jewellery and other items. Silversmiths specialise in the use of silver though, and it is the principal metal with which they work. Silver is cheaper than gold, and so is very popular with jewellers who are just starting out and cannot afford to make pieces in gold.
	Silverweed Silverweed is a flowering perennial plant in the rose family Rosaceae. It is native throughout the temperate Northern Hemisphere, often on river shores and in grassy habitats such as meadows and road-sides. The plant was formerly classified in the genus Potentilla but has recently been reclassified into the new genus Argentina.
	Simaroubaceae The Simaroubaceae is a small, mostly tropical, family in the order Sapindales. In recent decades it has been subject to much taxonomic debate, with several small families being split off. The best known species is the temperate China Tree-of-heaven Ailanthus altissima, which has become a cosmopolitan urban weed tree.
	Simón Bolívar Simn Jos Antonio de la Santsima Trinidad Bolvar y Ponte Palacios y Blanco was a leader of several independence movements throughout South America, collectively known as Bolvar's War. Credited with leading the fight for independence in what are now the countries of Venezuela, Colombia, Ecuador, Peru, Panama and Bolivia, he is revered as a hero in these countries and throughout much of the rest of Latin America.
	Simon Kuznets Simon Smith Kuznets was an economist at Wharton School of the University of Pennsylvania who won the 1971 Bank of Sweden Prize in Economic Sciences in Memory of Alfred Nobel "for his empirically founded interpretation of economic growth which has led to new and deepened insight into the economic and social structure and process of development".
	Simon Newcomb Simon Newcomb was an astronomer and mathematician. Born in the town of Wallace, Nova Scotia, Nova Scotia, Newcomb appears to have enjoyed no formal education beyond his short apprenticeship to a charlatan herbalist in 1851.
	Simon the Zealot The apostle Simon, called Simon the Zealot in Gospel of Luke 6:15 and Acts_of_the_Apostles 1:13; and Simon Kananaios, was one of the most obscure among the apostles of Jesus; little is recorded of him aside from his name. Few pseudepigrapha writings were connected to him, and Jerome does not include him in De viris illustribus.
	Simone de Beauvoir Simone de Beauvoir was a France author and philosopher. She wrote novels, monographs on philosophy, politics, and social issues, essays, biographies, and an autobiography. She is now best known for her 1949 treatise Le Deuxime Sexe , a detailed analysis of women's oppression and a foundational tract of contemporary feminism.
	Simone Weil Simone Weil was a France philosopher and mysticism.
	Simple harmonic motion Simple harmonic motion is the motion of a harmonic oscillator#Simple Harmonic Oscillator, a motion that is neither driven nor Damping. The motion is period , as it repeats itself at standard intervals in a specific manner - described as being Sinusoidal, with constant amplitude.
	Simplex In geometry, a simplex or n-simplex is an n-dimensional analogue of a triangle. Specifically, a simplex is the convex hull of a set of affine transformation Point s in some Euclidean space of dimension n or higher . For example, a 0-simplex is a Point , a 1-simplex is a line segment, a 2-simplex is a triangle, a 3-simplex is a tetrahedron, and a 4-simplex is a pentachoron .
	Simpson Desert The Simpson Desert is a desert covering approximately 170,000 square kilometres in central Australia, occupying an area bounded on the west by the Finke River and the Mabel Range, the Adam Range to the north, the Georgina River and the Diamantina River to the east, and Lake Eyre to the south.
	Simulation A simulation is an imitation of some real thing, state of affairs, or process. The act of simulating something generally entails representing certain key characteristics or behaviors of a selected physical or abstract system. Historically, the word had negative connotations: However, the connection between simulation and dissembling later faded out and is now only of linguistic interest.
	Simultaneous equations In mathematics, simultaneous equations , or systems of equations, are a set of equations where variables are shared. A solution consists of Function for the variables which satisfy all of the equations simultaneously. For example, the following is a set of equations:
	Simvastatin Simvastatin is a hypolipidemic agent belonging to the class of pharmaceuticals called "statins". It is used to control hypercholesterolemia and to prevent cardiovascular disease. Simvastatin is a synthetic derivate of a fermentation product of Aspergillus terreus.
	SiN SiN is a computer game developed by Ritual Entertainment and published by Activision in late 1998. SiN is a first-person shooter based on a modified version of the Quake II Game engine. The game was re-released over Valve Software's Steam on April 5, 2006, either as a standalone product, or bundled together with its sequel, SiN Episodes.
	Sinai Peninsula The Sinai Peninsula or Sinai is a triangle-shaped peninsula lying between the Mediterranean Sea and Red Sea , located in Egypt and has an area of about 60,000 square kilometers.
	Sincerely "Sincerely" is a popular music song written by Harvey Fuqua and Alan Freed and published in 1954 in music. Originally recorded by The Moonglows, the biggest-selling version was a cover version recorded by The McGuire Sisters, entering the charts in 1954 in music and reaching #1 1955 in music.
	Sincerely Yours Sincerely Yours is the sophomore album by R&B/OPM group, One Vo1ce. The album was less sucessful than their debut. The album was supposed to show their growths as artists but it received mixed reviews. Along with the album came a new sexy image a la Britney Spears. The album would only sell 20,000 copies in the United States and 25,000 copies in the Philippines where it only went Silver.
	Sinclair Lewis Sinclair Lewis was an United States novelist and playwright. In 1930 he became the first American to win the Nobel Prize in Literature, "for his vigorous and graphic art of description and his ability to create, with wit and humour, new types of characters". His works are known for their insightful and critical views of American society and capitalism values.
	Sine wave The sine wave or sinusoid is a function that occurs often in mathematics, signal processing, alternating-current power engineering, and other fields. Its most basic form is: which describes a wavelike function of time with: *peak deviation from center  =
	Singapore Singapore, formally the Republic of Singapore , is an Island nation city-state and the smallest country in Southeast Asia. It is located on the southern tip of the Malay Peninsula, south of the Malaysia state of Johor, and north of the Indonesia Riau Islands.
	Singapore dollar The dollar is the currency of Singapore. It is normally abbreviated with the dollar sign $, or alternatively S$ to distinguish it from other dollar-denominated currencies. It is divided into 100 cents.
	Singer A singer is a type of musician who uses his or her human voice to produce music. Usually, singing refers to vocal melody only, though vocalist is a similar term which also encompasses non-melodic sounds and effectively includes anyone using their voice as part of a musical composition, including spoken word, Death grunt, and rapping.
	Single file Single File, an Pop rock band from Denver, Colorado started out originally as a jazz trio. Their first EP "As You Were" was released in 2003. The band consist of three members, Joe, Sloan, and Chris. The three have been preforming and playing together since middle school.
	Single-leaf Pinyon The Single-leaf Pinyon is a pine in the pinyon pine group, native to the United States and northwest Mexico. The range is in southernmost Idaho, western Utah, Arizona, southwest New Mexico, Nevada, eastern and southern California and northern Baja California.
	Sinhala Sinhala is the mother tongue of the Sinhalese people, the largest ethnic group of Sri Lanka. It belongs to the Indo-Aryan languages of the Indoeuropean languages. The term Sinhala is derived from the Sinhalese term ?????. Sinhala is spoken by about 16 million people in Sri Lanka, about 13 million of whom are native speakers.
	Sinistral Sinistral or left lateral refers to the horizontal movement of blocks on either side of a geological fault or the sense of movement within a geological shear. Movement is sinistral if the block on the other side of the fault moves to the left, or if stradling the fault the left side moves toward the observer.
	Sinistrals The Sinistrals are a group of four god-like warriors from the Lufia series of video games. The Sinistrals are the main antogonists of the Lufia series. They gather atop their Fortress Of Doom but are usually fought atop Towers, the names of which differ with each game.
	Sink In plumbing, a sink or basin is a bowl-shaped plumbing fixture that is used for washing hands or small objects such as food, eating utensiles, Pantyhoses, socks or underwear. In American plumbing parlance, a bathroom sink is known as a lavatory.
	Sinkhole Sinkholes, also known as sinks, shakeholes or dolina, and cenotes, are a feature of landscapes that are based on limestone. They are found worldwide. One form is the subsidence of a cave roof. The result in this case is a depression in the surface topography.
	Sinn Féin Sinn Fin is a name used by a series of Irish political movements of the 20th century, each of which claimed sole descent from the original party established by Arthur Griffith in 1905. The name means "ourselves" or "we ourselves". Some popular accounts claim the name means "alone together," though others clearly dispute the accuracy of this popular translation.
	Sinningia Sinningia is a genus of flowering plants in the family Gesneriaceae. There are about 65 species of tuberous perennial herbs, all occurring in Central America and South America, with the greatest concentration of species occurring in southern Brazil. The best-known species, Sinningia speciosa, was originally introduced to cultivation as Gloxinia speciosa and is still commonly known to gardeners and in the horticultural trade as "gloxinia".
	Sinningia speciosa Sinningia speciosa, commonly known in the horticultural trade as Gloxinia, is a tuberous member of the flowering plant family Gesneriaceae. The common name has persisted since its original introduction to cultivation from Brazil in 1817 as Gloxinia speciosa. The name Florist's gloxinia is sometimes used to distinguish it from the rhizomatous species now included in the genus Gloxinia.
	Sino-Tibetan languages The Sino-Tibetan languages form a language family composed of Chinese language and the Tibeto-Burman languages, including some 250 languages of East Asia. They are second only to the Indo-European languages in terms of their number of speakers. Many of the better known Sino-Tibetan languages are tone .