sheathbill, (family Chionididae), either of two species of white stout-billed Antarctic shorebirds making up genus Chionis (order Charadriiformes), the only bird family confined to south polar regions. It is named for the rough, horny sheath around the base of its bill shielding its nostrils. The

sheathed bacteria, group of microorganisms found widely in nature in slow-running water, many species of which are attached to submerged surfaces. They are characterized by a filamentous arrangement of cells enclosed in a sheath. The sheaths of Leptothrix, Crenothrix, and Clonothrix are variously

Sabaʾ, kingdom in pre-Islamic southwestern Arabia, frequently mentioned in the Bible (notably in the story of King Solomon and the Queen of Sheba) and variously cited by ancient Assyrian, Greek, and Roman writers from about the 8th century bce to about the 5th century ce. Its capital, at least in

Gulf of Aden: …the gulf’s terrain is the Sheba Ridge, an extension of the Indian Ocean ridge system, which extends along the middle of the gulf. The rough topography of the ridge includes a well-defined median valley that is continually offset by faults running approximately northeast to southwest. The largest of these faults…

Queen of Sheba was, according to Jewish and Islamic traditions, the ruler of the kingdom of Sabaʾ (or Sheba) in southwestern Arabia. In the biblical account of the reign of King Solomon, she visited his court at the head of a camel caravan bearing gold, jewels, and spices. The story provides

Shebaa Farms, area of land along the border of Lebanon and the Golan Heights (a territory recognized by most of the international community as part of Syria but occupied by Israel since the Six-Day War [1967]) that is claimed by Lebanon, internationally recognized as part of Syria, and occupied by

Afghanistan: Physiographic regions: …strategic importance and include the Shebar Pass, located northwest of Kabul where the Bābā Mountains branch out from the Hindu Kush, and the storied Khyber Pass, which leads to the Indian subcontinent, on the Pakistan border southeast of Kabul. The Badakhshān area in the northeastern part of the central highlands…

Shebeli River, river in eastern Africa, rising in the Ethiopian Highlands and flowing southeast through the arid Ogaden Plateau. The Shebeli River crosses into Somalia north of Beledweyne (Beletwene) and continues south to Balcad, about 20 miles (32 km) from the Indian Ocean, turning southwest

Shebeli River, river in eastern Africa, rising in the Ethiopian Highlands and flowing southeast through the arid Ogaden Plateau. The Shebeli River crosses into Somalia north of Beledweyne (Beletwene) and continues south to Balcad, about 20 miles (32 km) from the Indian Ocean, turning southwest

Sheberghān, town, northern Afghanistan. Sheberghān is situated 80 miles (130 km) west of Mazār-e Sharīf, along the banks of the Safid River. It is surrounded by irrigated agricultural land, and it lies on a main east-west road through northern Afghanistan. Sheberghān was once the capital of an

Shibīn al-Kawm, capital of Al-Minūfiyyah muḥāfaẓah (governorate), Lower Egypt. It lies 37 miles (60 km) northwest of Cairo in the southern Nile River delta. Its centre, 10 miles (16 km) east of the Rosetta Branch of the Nile, is situated on the west side of the Shibīn Canal, which flows north from

Sheberghān, town, northern Afghanistan. Sheberghān is situated 80 miles (130 km) west of Mazār-e Sharīf, along the banks of the Safid River. It is surrounded by irrigated agricultural land, and it lies on a main east-west road through northern Afghanistan. Sheberghān was once the capital of an

Sheboygan, city, seat (1846) of Sheboygan county, eastern Wisconsin, U.S. The city is located along Lake Michigan at the mouth of the Sheboygan River, about 50 miles (80 km) north of Milwaukee. It was established as a fur-trading post in 1818 by William Farnsworth of Green Bay and was settled as a

Shebshi Mountains, mountain range in eastern Nigeria, extending approximately 100 miles (160 km) in a north-south direction between the Benue and Taraba rivers. Its Dimlang (Vogel) Peak is one of the highest points—with an elevation of 6,699 feet (2,042 metres)—in Nigeria, rising above the central

Dinah: …raped near the city of Shechem, by Shechem, son of Hamor the Hivite (the Hivites were a Canaanitish people). Because Shechem then wished to marry Dinah, Hamor suggested to Jacob that their two peoples initiate a policy of commercial and social intercourse. Dinah’s brothers Simeon and Levi pretended to agree…

Shechem, Canaanite city of ancient Palestine, near Nablus. The two locations have been closely—though erroneously—equated for almost 2,000 years: both rabbinic and early Christian literature commonly equated Nablus with ancient Shechem, and Nablus has been called Shekhem in Hebrew to the present,

Shekhina, (Hebrew: “Dwelling,” or “Presence”), in Jewish theology, the presence of God in the world. The designation was first used in the Aramaic form, shekinta, in the interpretive Aramaic translations of the Old Testament known as Targums, and it was frequently used in the Talmud, Midrash, and

kosher: …slaughtered by ritual method of shehitah (see below); (3) that the meat has been salted to remove the blood (Deuteronomy 12:16, 23–25, and elsewhere) after the carcass has been critically examined for physical blemishes and that the ischiatic nerve has been removed from hindquarters (Genesis 32:32); and (4) that meat…

Daniel Shechtman is an Israeli chemist who was awarded the 2011 Nobel Prize for Chemistry for his discovery of quasicrystals, a type of crystal in which the atoms are arranged in a pattern that follows mathematical rules but without the pattern ever repeating itself. Shechtman received a bachelor’s

saltbox: …of the hall into a lean-to constructed at the back of the house. The pitched roof was then extended downward over the new kitchen, creating the characteristic long-in-back silhouette that gave the house its name. Late in the 17th century the lean-to was often included as part of the original…

Tino Sehgal: …anticipation of the opening of the Shed (2019), a cultural institution in New York City.

Samuel David Luzzatto was a Jewish writer and scholar. In his writings, which are in Hebrew and Italian, Luzzatto presents an emotional and antiphilosophical concept of Judaism, and his Hebrew poetry is also pervaded by national spirit. His chief merit as a scholar lies in biblical exegesis, Hebrew

Cassiopeia: Its brightest star, Shedar (Arabic for “breast”), has a magnitude of 2.2. Tycho’s Nova, one of the few recorded supernovas in the Milky Way Galaxy, appeared in Cassiopeia in 1572. This constellation also contains the prominent radio source Cassiopeia A, a

Shedd Aquarium, one of the largest indoor aquariums in the world, located in Chicago, Illinois, U.S. Built with funds donated by John Graves Shedd, a prominent local businessman, the aquarium opened in 1930. The aquarium houses in excess of 20,000 speciments of some 1,500 species of fishes (both

Shedd Aquarium: Built with funds donated by John Graves Shedd, a prominent local businessman, the aquarium opened in 1930. The aquarium houses in excess of 20,000 speciments of some 1,500 species of fishes (both freshwater and marine) and other aquatic animals from around the world. The total water capacity is some 5…

molt, biological process of molting (moulting)—i.e., the shedding or casting off of an outer layer or covering and the formation of its replacement. Molting, which is regulated by hormones, occurs throughout the animal kingdom. It includes the shedding and replacement of horns, hair, skin, and

textile: The weaving process: The process is called shedding and the space between the sheets the shed. A pick of weft is then laid between the two sheets of warp, in the operation known as picking. A new shed is then formed in accordance with the desired weave structure, with some or all…

card game: Classification: Shedding games. The aim is either to be the first to play out all one’s cards (crazy eights, Michigan, Newmarket, president) or to avoid being the last player remaining with a card or cards in hand (old maid). Melding or rummy games. The aim is…

Al-Fayyūm: …has many ancient sites, including Shedet (later Crocodilopolis), chief center for worship of the crocodile-god Sebek, near which Al-Fayyūm town now lies. In the time of the Ptolemies, Setje was named Arsinoe after the wife of Ptolemy II Philadelphus. Since pharaonic times Al-Fayyūm’s irrigation waters, its lifeline, have been controlled…

Wilfrid Sheed was an American author of essays, biographies, and other nonfiction works and of satirical fiction that contrasts transient modern values with steadfast traditional values. Sheed’s parents, authors themselves, founded Sheed & Ward, a leading Roman Catholic publishing firm. The family

Wilfrid Sheed was an American author of essays, biographies, and other nonfiction works and of satirical fiction that contrasts transient modern values with steadfast traditional values. Sheed’s parents, authors themselves, founded Sheed & Ward, a leading Roman Catholic publishing firm. The family

Brat Pack: Impact of the Brat Pack label: …Michael Hall, Molly Ringwald, and Ally Sheedy—did not feature in the story, but the title stuck to them regardless. As a result, the friendships that had formed between some of the actors were damaged because quite a few of them did not want to be caught in public hanging out…

whitefish: The inconnu, cony, or sheefish (Stenodus leucichthys), an oily-fleshed salmonid, is eaten in the far northwestern regions of North America.

Sheehan’s syndrome, insufficiency of pituitary hormones (hypopituitarism), caused by destruction of cells of the anterior pituitary gland by oxygen starvation, usually at the time of childbirth. The condition may also result from septic shock, burn shock, or a massive hemorrhage. Once the most

Sheehan’s syndrome, insufficiency of pituitary hormones (hypopituitarism), caused by destruction of cells of the anterior pituitary gland by oxygen starvation, usually at the time of childbirth. The condition may also result from septic shock, burn shock, or a massive hemorrhage. Once the most

Cindy Sheehan is an American peace activist whose public opposition to the wars in Iraq and Afghanistan began after her son was killed in Iraq in 2004. Sheehan’s vigil outside U.S. Pres. George W. Bush’s ranch in Texas in 2005 received international media coverage and established her as one of the

Patty Sheehan is an American golfer who was one of the most consistent players on the women’s tour throughout the 1980s and ’90s. In 1993 she secured a place in the Ladies Professional Golf Association (LPGA) Hall of Fame with her 30th career tour victory. Sheehan first played golf at age 2, when

Patty Sheehan is an American golfer who was one of the most consistent players on the women’s tour throughout the 1980s and ’90s. In 1993 she secured a place in the Ladies Professional Golf Association (LPGA) Hall of Fame with her 30th career tour victory. Sheehan first played golf at age 2, when

Jon Tester: …fierce challenge from Republican opponent Tim Sheehy, with political action committees pouring tens of millions of dollars into the race.

Sheela Na Gig, a type of (usually) stone architectural figure of uncertain significance, representing a naked woman gesturing to or otherwise flagrantly displaying exaggerated genitalia. Sheela Na Gigs are usually situated on or in Romanesque churches of western and central Europe (dating roughly

Sheela Na Gig, a type of (usually) stone architectural figure of uncertain significance, representing a naked woman gesturing to or otherwise flagrantly displaying exaggerated genitalia. Sheela Na Gigs are usually situated on or in Romanesque churches of western and central Europe (dating roughly

PJ Harvey: “Sheela-na-gig,” for instance, a single from her first album, Dry (1992), took as its central image the female exhibitionist carvings with gaping genitals found throughout Ireland and the United Kingdom, whose origins are the subject of debate. The song, like many others by Harvey, treats…

Sheela Na Gig, a type of (usually) stone architectural figure of uncertain significance, representing a naked woman gesturing to or otherwise flagrantly displaying exaggerated genitalia. Sheela Na Gigs are usually situated on or in Romanesque churches of western and central Europe (dating roughly

Charles Sheeler was an American painter who is best known for his precise renderings of industrial forms in which abstract, formal qualities were emphasized. Sheeler studied at the School of Industrial Art in Philadelphia and then at the Pennsylvania Academy of Fine Arts. He contributed six

Eddie Cochran: …producer, and the second with Sharon Sheeley, his girlfriend. Sheeley, a successful professional songwriter, was another passenger in the car taking Cochran and Gene Vincent back to London after a concert in Bristol on the fateful night in 1960; the crash killed Cochran, put Sheeley into the hospital, and left…

Fulton J. Sheen was an American religious leader, evangelist, writer, Roman Catholic priest, and radio and television personality. Sheen was the oldest of four children born to Newt Sheen, a farmer, and his wife Delia. As a child, he served as an altar boy at the Cathedral of St. Mary of the

Charlie Sheen is an American actor who became equally famous for his work in such films as Platoon (1986) and Major League (1989) and the television series Two and a Half Men (2003–11) and Anger Management (2012–14) as for various controversies involving his personal life and public statements.

Fulton J. Sheen was an American religious leader, evangelist, writer, Roman Catholic priest, and radio and television personality. Sheen was the oldest of four children born to Newt Sheen, a farmer, and his wife Delia. As a child, he served as an altar boy at the Cathedral of St. Mary of the

Fulton J. Sheen was an American religious leader, evangelist, writer, Roman Catholic priest, and radio and television personality. Sheen was the oldest of four children born to Newt Sheen, a farmer, and his wife Delia. As a child, he served as an altar boy at the Cathedral of St. Mary of the

Martin Sheen is an American actor best known for playing Capt. Benjamin L. Willard in the epic Vietnam War film Apocalypse Now (1979) and for portraying the U.S. president Josiah Bartlet in the political drama television series The West Wing (1999–2006). He is the father of actors Charlie Sheen,

Fulton J. Sheen was an American religious leader, evangelist, writer, Roman Catholic priest, and radio and television personality. Sheen was the oldest of four children born to Newt Sheen, a farmer, and his wife Delia. As a child, he served as an altar boy at the Cathedral of St. Mary of the

the Ramones: …such as “Blitzkrieg Bop,” “Sheena Is a Punk Rocker,” and “I Wanna Be Sedated” contrasted sharply with the complex, carefully orchestrated mainstream rock of the era. In ripped jeans and black leather jackets, the Ramones made their reputation with almost-nonstop touring and energetic live performances, notably at New York…

artiodactyl: antelopes, sheep, goats, and cattle. It is one of the larger mammal orders, containing about 200 species, a total that may be somewhat reduced with continuing revision of their classification. Many artiodactyls are well known to humans, and the order as a whole is of more…

sheep, (Ovis aries), species of domesticated ruminant (cud-chewing) mammal, raised for its meat, milk, and wool. The sheep is usually stockier than its relative the goat (genus Capra); its horns, when present, are more divergent; it has scent glands in its face and hind feet; and the males lack the

dipteran: Larvae: The best-known blow flies are sheep blow flies, principally species of Lucilia. Maggots of L. sericata, for example, feed on small dead animals and in abattoirs and garbage cans; they oviposit in soiled wool around the anus of sheep or in the pus exuding from scratches and wounds, where they…

bot fly: …bot flies (Cephenemyia) and the sheep bot fly (Oestrus ovis). Active larvae, deposited in the nostrils of sheep, often cause a nervous condition called blind staggers. Members of Oestrinae are noted for their swift flying; they are capable of moving at 20–30 km (about 12–19 miles) per hour.

Sheep were first domesticated from wild species by at least 5000 bce and are raised for their fleece (wool), milk, and meat. The flesh of mature sheep is called mutton while that of immature animals is called lamb. Of more than 200 breeds of sheep in existence in the world, the majority are of

sheepdog, In general, any dog breed developed to herd sheep; specifically, the border collie. Most sheepdog breeds stand about 2 ft (60 cm) and weigh over 50 lbs (23 kg). The French briard has bushy brows and a long, waterproof coat. The Belgian sheepdog has long black hair and erect ears. The

fescue: The fine-leaved sheep fescue (F. ovina), often found on mountainsides, grows in dense tufts and forms turfs in dry or sandy soil. Blue fescue (F. glauca) has smooth silvery leaves and is commonly planted in ornamental borders. Red fescue (F. rubra) is used in lawn grass mixtures.

narrow-mouthed toad: The Mexican narrow-mouthed toad, or sheep frog (Hypopachus cuneus), is similar but is larger and has a yellow stripe on its back. It hides in burrows, pack rat nests, or, as does the eastern narrow-mouth, under objects lying on the ground.

louse fly: …most common wingless species, the sheep ked (Melophagus ovinus), is about 6 millimetres (0.2 inch) long, red-brown in colour, and parasitic on sheep. Each female produces from 10 to 20 larvae at the rate of about one per week. The sheep ked cannot survive if separated from its host for…

lambkill, (species Kalmia angustifolia), an open upright woody shrub of the heath family (Ericaceae). Lambkill is 0.3–1.2 m (1–4 feet) tall and has glossy, leathery, evergreen leaves and showy pink to rose flowers. It contains andromedotoxin, a poison also common to other Kalmia species (including

Andy Goldsworthy: Art from the 1980s to the 2000s: …he made a series called Sheep Paintings, for which he placed a large canvas on the ground in a sheep pasture with a sheep lick placed in the middle of the canvas. The finished works had a white circle in the center (where the lick had been) surrounded by the…

pox disease: sheep pox, horse pox, fowl pox, cowpox, goat pox, and swine pox. Transmission occurs in different ways, depending on the virus. Some pox viruses are spread by direct contact, whereas others may be transmitted via inhalation of infectious particles or by biting insects. Cowpox (vaccinia)…

roche moutonnée, glaciated bedrock surface, usually in the form of rounded knobs. The upstream side of a roche moutonnée has been subjected to glacial scouring that has produced a gentle, polished, and striated slope; the downstream side has been subjected to glacial plucking that has resulted in a

sorrel: Sheep sorrel (Rumex acetosella) is a weedy species that is native to Europe and has become widespread in North America. It is an attractive but troublesome invader that occurs in lawns and gardens as well as meadows and grassy slopes. It sprouts from spreading rootstocks…

sheep’s bit, (Jasione montana), annual to biennial herb of the bellflower family (Campanulaceae), bearing clustered heads of blue flowers. The plants grow scattered in sandy or acid fields or meadows, and they also grow on cliffsides. Sheep’s bit is native to Europe and has been introduced into

insect: Medical significance: This infestation, called sheep-strike, causes severe economic damage.

roche moutonnée, glaciated bedrock surface, usually in the form of rounded knobs. The upstream side of a roche moutonnée has been subjected to glacial scouring that has produced a gentle, polished, and striated slope; the downstream side has been subjected to glacial plucking that has resulted in a

viburnum: rufidulum), similar but taller; the sheepberry, or nannyberry (V. lentago), with finely toothed, oval leaves; and the arrowwood (V. dentatum), with roundish to oval, coarsely toothed leaves. Laurustinus (V. tinus), a 3-metre-tall evergreen with oblong leaves, is native to the Mediterranean area. Sweet viburnum (V. odoratissimum), from India and Japan,…

sheepdog, In general, any dog breed developed to herd sheep; specifically, the border collie. Most sheepdog breeds stand about 2 ft (60 cm) and weigh over 50 lbs (23 kg). The French briard has bushy brows and a long, waterproof coat. The Belgian sheepdog has long black hair and erect ears. The

Andy Goldsworthy: Art from the 1980s to the 2000s: He also began Sheepfolds in 1996, which entailed restoring sheepfold structures (four-walled sheep enclosures usually made of stone) and adding a sculpture to many of the sites throughout Cumbria county in northwestern England.

lambkill, (species Kalmia angustifolia), an open upright woody shrub of the heath family (Ericaceae). Lambkill is 0.3–1.2 m (1–4 feet) tall and has glossy, leathery, evergreen leaves and showy pink to rose flowers. It contains andromedotoxin, a poison also common to other Kalmia species (including

knot: The sheepshank is a simple knot useful for temporarily shortening a rope. It is made by making a double loop in the rope and tying a half hitch at each end. It can be used to strengthen a rope at its weak point by placing the…

sheepshead, (Archosargus probatocephalus), popular edible sport fish in the family Sparidae (order Perciformes), common in Atlantic and Gulf of Mexico waters of the southern North American coast. Although once prevalent in the New England to Chesapeake Bay area, the species has inexplicably become

drum: …of the eastern Pacific; the freshwater drum (Aplodinotus grunniens), a silvery, lake-and-river fish of the Americas; the kingfish, or whiting (Menticirrhus saxatilis), of the Atlantic, notable among drums in that it lacks an air bladder; and the sea drum, or black drum (Pogonias cromis), a gray or coppery red, western…

shoe: Materials: Sheepskin is used in linings and slippers. Reptile leathers (alligator, lizard, and snake) are used in women’s and some men’s shoes. Cordovan (a small muscle layer obtained from horsehide) is a heavy leather used in men’s shoes. Patent leather, usually made from cattle hide, is…

Queen: …charts with its third album, Sheer Heart Attack (1974). A Night at the Opera (1975), one of pop music’s most expensive productions, sold even better. Defiantly eschewing the use of synthesizers, the band constructed a sound that was part English music hall, part Led Zeppelin, epitomized by the mock-operatic “Bohemian…

shipyard: …a floating stage called a sheer hulk, where it received its masts and rigging. Modern ships also are launched incomplete.

Maundy Thursday, the Thursday before Easter, observed in commemoration of Jesus Christ’s institution of the Eucharist during the Last Supper. Key Days of Holy Week The name is thought to be a Middle English derivation taken from a Latin anthem sung in Roman Catholic churches on that day: “Mandatum

Ed Sheeran is a British singer-songwriter known for his genre-crossing style infused with elements of folk, rock, rhythm and blues (R&B), pop, and hip-hop. As a child, Sheeran was surrounded by art and music, with parents who worked in the arts and a brother who would go on to become a music

Ed Sheeran is a British singer-songwriter known for his genre-crossing style infused with elements of folk, rock, rhythm and blues (R&B), pop, and hip-hop. As a child, Sheeran was surrounded by art and music, with parents who worked in the arts and a brother who would go on to become a music

Agra Fort: …its northeast is the splendid Palace of Mirrors (Sheesh Mahal), its walls and ceilings inlaid with thousands of small mirrors. The structure’s two dazzling chambers were probably used as baths and possibly as a boudoir by the queens.

amphibole: Crystal structure: …I beams and the mica sheets. Both structures contain a band of octahedrons sandwiched between two oppositely pointing chains of tetrahedrons. Combinations of these two basic structural units, or “modules,” can produce all other minerals in the layer silicate and chain silicate groups. The term biopyribole has been used to…

rigging: …lowered, and the tacks and sheets, which hold down the lower corners of the sails. The history of the development of rigging over the centuries is obscure, but the combination of square and fore-and-aft sails in the full-rigged ship created a highly complex, interdependent set of components.

materials science: Polymer-matrix composites: Sheet forming, used since the 19th century by metallurgists, is now applied to the processing of thermoplastic composites. In a typical thermoforming process, the sheet stock, or preform, is heated in an oven. At the forming temperature, the sheet is transferred into a forming system,…

sill, flat intrusion of igneous rock that forms between preexisting layers of rock. Sills occur in parallel to the bedding of the other rocks that enclose them, and, though they may have vertical to horizontal orientations, nearly horizontal sills are the most common. Sills may measure a fraction

knot: The sheet bend, or weaver’s knot, is widely used by sailors for uniting two ropes of different sizes. The end of one rope is passed through a loop of the other, is passed around the loop, and under its own standing part. An ordinary fishnet is…

sheet erosion, detachment of soil particles by raindrop impact and their removal downslope by water flowing overland as a sheet instead of in definite channels or rills. A more or less uniform layer of fine particles is removed from the entire surface of an area, sometimes resulting in an extensive

technology of photography: Sheet film: View and studio cameras generally take sheet film—single sheets (typical sizes range between 2 1 2 × 3 1 2 and 8 × 10 inches) loaded in the darkroom into light-tight film holders for subsequent insertion in the camera.

oceanic crust: Sheet flows have the appearance of wrinkled bed sheets. They commonly are thin (only about 10 cm [4 inches] thick) and cover a broader area than pillow lavas. There is evidence that sheet flows are erupted at higher temperatures than those of the pillow variety.…

materials science: Polymer-matrix composites: Sheet forming, used since the 19th century by metallurgists, is now applied to the processing of thermoplastic composites. In a typical thermoforming process, the sheet stock, or preform, is heated in an oven. At the forming temperature, the sheet is transferred into a forming system,…

Hugo Junkers: His J-1 Blechesel (“Sheet Metal Donkey”) monoplane was the first successful all-metal airplane (1915), and his F-13 was the first all-metal transport plane (1919). Many Junkers aircraft had a corrugated sheet-metal skin, which was copied by several American builders, including the Ford Motor Company. The Junkers…

sheet moss, (Hypnum curvifolium), a species of carpet moss (family Hypnaceae). The names sheet moss and carpet moss refer to the growth pattern of the plants, which often form large carpetlike mats on rocks or soil. This species is sometimes used by florists in constructing flower

phyllosilicate, compound with a structure in which silicate tetrahedrons (each consisting of a central silicon atom surrounded by four oxygen atoms at the corners of a tetrahedron) are arranged in sheets. Examples are talc and mica. Three of the oxygen atoms of each tetrahedron are shared with

food preservation: Canning: 5 percent sheet steel with a thin coating of tin, soon became common. These cans had a double seamed top and bottom to provided an airtight seal and could be manufactured at high speeds.

clay mineral: Kaolin-serpentine group: …consists of tetrahedral and octahedral sheets in which the anions at the exposed surface of the octahedral sheet are hydroxyls (see Figure 4). The general structural formula may be expressed by Y2 - 3Z2O5(OH)4, where Y are cations in the octahedral sheet such as Al3+ and Fe3+ for dioctahedral species…

harbours and sea works: The sheet-piled quay: An extension of the piled jetty concept is a quay design based on steel sheetpiling, the design becoming increasingly popular with improvements in the detail and manufacture of the material. Steel sheetpiling consists in essence of a series of rolled trough sections…

sheet-web weaver, (family Linyphiidae), a rather common group of small spiders (order Araneida) numbering about 2,000 species worldwide. Most are less than 6 mm (14 inch) in length and are seldom seen. Their webs are flat and sheetlike and dome- or cup-shaped. The spider is usually found on the