Ibibio: (Enyong), Southern (Eket), Delta (Andoni-Ibeno), Western (Anang), and Eastern (the Ibibio proper).

iron: Occurrence, uses, and properties: Delta iron, characterized by a body-centred cubic crystal structure, is stable above a temperature of 1,390 °C (2,534 °F). Below this temperature there is a transition to gamma iron, which has a face-centred cubic (or cubic close-packed) structure and is paramagnetic (capable of being only…

kite: Kite structure: …flat, bowed, box, sled, and delta require a rigid framework fitted with a sail material, as does the compound, which is formed by integrating two or more of the above types to form one kite. A radical departure in design, the parafoil, a soft airplane-wing shape with no rigid members,…

Anaïs Nin: …further divided by the posthumous Delta of Venus: Erotica (1977) and later collections of previously unpublished erotic stories written on commission during the financially lean years of the early 1940s. Her other works of fiction included a collection of short stories, Under a Glass Bell (1944); the novels House of…

astronomical map: Star names and designations: …rijl al-Jawzah, “Leg of Orion,” Mintaka, the “Belt,” and Saiph, the “Sword,” all follow the Ptolemaic figure; Betelgeuse, from yad al-Jawzah, is an alternative non-Ptolemaic description meaning “hand of Orion”; and Bellatrix, meaning “Female Warrior,” either is a free Latin translation of an independent Arabic title, al-najid, “the conqueror,” or…

electroencephalography: …irregular slow waves known as delta waves arise from the vicinity of a localized area of brain damage.

Delta Works, in the southwestern Netherlands, a giant flood-control project that closed off the Rhine, Meuse [Maas], and Schelde estuaries with dikes linking the islands of Walcheren, Noord-Beveland, Schouwen, Goeree, and Voorne and created what amounts to several freshwater lakes that are free of

Delta Works, in the southwestern Netherlands, a giant flood-control project that closed off the Rhine, Meuse [Maas], and Schelde estuaries with dikes linking the islands of Walcheren, Noord-Beveland, Schouwen, Goeree, and Voorne and created what amounts to several freshwater lakes that are free of

delta ray, in physics, any atomic electron that has acquired sufficient energy by recoiling from a charged particle passing through matter to force, in turn, some dozens of electrons out of other atoms along its own trajectory. The charged particle giving rise to delta rays generally is relatively

subatomic particle: Quarks and antiquarks: …have been given the name delta, or Δ. The deltas have spins of 3 2 , and the up and down quarks combine in four possible configurations—uuu, uud, udd, and ddd—where u and d stand for up and down. The charges of these Δ states are +2e,

Scott Morrison: Fortress Australia, the stroll out, and the 2022 election: …2021 of the highly transmissible Delta variant of the coronavirus quickly revealed the vulnerability of “Fortress Australia,” and Morrison shifted strategies, refocusing the government’s prevention efforts to vaccination, the slow pace of which (mocked as a “stroll out”) became the object of increasing criticism. In July Morrison presented a four-phase…

electroencephalography: …irregular slow waves known as delta waves arise from the vicinity of a localized area of brain damage.

Delta Wedding, novel by Eudora Welty, published in 1946. It was Welty’s first full-length novel, presenting a comprehensive and insightful portrait of a Southern plantation family in 1923. Set in the context of the wedding of one of the daughters, the novel explores the relationships between

airplane: Wing types: Delta wings are formed in the shape of the Greek letter delta (Δ); they are triangular wings lying at roughly a right angle to the fuselage. The supersonic Concorde featured delta wings.

Delta Works, in the southwestern Netherlands, a giant flood-control project that closed off the Rhine, Meuse [Maas], and Schelde estuaries with dikes linking the islands of Walcheren, Noord-Beveland, Schouwen, Goeree, and Voorne and created what amounts to several freshwater lakes that are free of

Mississippi: Relief and soils: …the great fertile crescent called the Delta is the old floodplain of the Yazoo and Mississippi rivers, comprising some 6,250 square miles (16,200 square km) of black alluvial soil several feet deep. Once subject to disastrous floods, the land is now protected by levee and reservoir systems.

delta-8-THC, naturally occurring chemical compound found in cannabis plants, namely the species Cannabis indica and C. sativa, which are sources of hemp and marijuana. Delta-8-tetrahydrocannabinol (THC) is chemically related to delta-9-THC, which is the primary psychoactive compound in cannabis

delta-8-THC, naturally occurring chemical compound found in cannabis plants, namely the species Cannabis indica and C. sativa, which are sources of hemp and marijuana. Delta-8-tetrahydrocannabinol (THC) is chemically related to delta-9-THC, which is the primary psychoactive compound in cannabis

tetrahydrocannabinol (THC), active constituent of marijuana and hashish that was first isolated from the Indian hemp plant (Cannabis sativa) and synthesized in 1965. For the effects of the drug, see

lead poisoning: Susceptibility and treatment: …in a gene known as ALAD (delta-aminolevulinate dehydratase) results in the production of an enzyme called ALAD2, which has an abnormally high binding affinity for lead. Both the normal enzyme, known as ALAD1, and the variant enzyme function in heme biosynthesis and therefore play an underlying role in the formation…

electroencephalography: …irregular slow waves known as delta waves arise from the vicinity of a localized area of brain damage.

Paul Sereno: …in 1996, discovered the predator Deltadromeus agilis while excavating Cretaceous sediments. The theropod was determined to be among the swiftest dinosaurs yet discovered on the basis of its delicate, narrow frame. The expedition also brought to light the relatively complete skull of a specimen of Carcharodontosaurus saharicus. Carcharodontosaurus had been…

Deltatheridium, a genus of extinct mammals found as fossils in rocks from Upper Cretaceous times (about 100–65.5 million years ago) of Asia and, questionably, North America. Deltatheridium was a small insectivorous mammal about the size of a small rat. It is now recognized to be a metatherian, a

Delta Works, in the southwestern Netherlands, a giant flood-control project that closed off the Rhine, Meuse [Maas], and Schelde estuaries with dikes linking the islands of Walcheren, Noord-Beveland, Schouwen, Goeree, and Voorne and created what amounts to several freshwater lakes that are free of

Emmanuelle Charpentier: With the assistance of Elitza Deltcheva, who had been a graduate student in Charpentier’s laboratory in Vienna, Charpentier showed how the CRISPR system could cut and modify DNA at specific locations in the genome. In particular, Deltcheva provided evidence that tracrRNA and CRISPR RNA interact to guide Cas9 to…

deltoideus muscle, large, triangular muscle that covers the shoulder and serves mainly to raise the arm laterally. The deltoid, as it is commonly known, originates on the outer front third of the clavicle (collarbone) and the lower margin of the spine of the scapula (shoulder blade). Its fibres

deltoideus muscle, large, triangular muscle that covers the shoulder and serves mainly to raise the arm laterally. The deltoid, as it is commonly known, originates on the outer front third of the clavicle (collarbone) and the lower margin of the spine of the scapula (shoulder blade). Its fibres

Jean André Deluc was a Swiss-born British geologist and meteorologist whose theoretical work was influential on 19th-century writing about meteorology. Deluc was educated in mathematics and the natural sciences. He engaged in business, and on his business travels around Europe he collected mineral

Paul Ricca was a Chicago gangster who was considered “the brains” behind the operations of Al Capone and Capone’s successors, Frank Nitti and Tony Accardo. He was the Chicago representative in the formation of the national crime syndicate in 1934, led by Lucky Luciano, Meyer Lansky, and other New

flood myth, any of numerous mythologies in which a flood destroys a typically disobedient original population. Myths of a great flood (the Deluge) are widespread over Eurasia and America. The flood, with a few exceptions, is an expiation by the water, after which a new type of world is created. The

Western painting: United States: “The Deluge” (1804; Metropolitan Museum of Art, New York City) is a typical macabre invention, with bodies in a raging tempest swept ashore to where wolves and serpents lurk. On his return to the United States, however, his work assumed a quieter, more pensive aspect.…

delusion, in psychology, a rigid system of beliefs with which a person is preoccupied and to which the person firmly holds, despite the logical absurdity of the beliefs and a lack of supporting evidence. Delusions are symptomatic of such mental disorders as paranoia, schizophrenia, and major

Panama: Ethnic groups: …Western Hemisphere’s first Jewish president, Eric Arturo Delvalle (del Valle), who served in the 1980s.

Paul Delvaux was a Belgian Surrealist painter and printmaker whose canvases typically portray transfixed nudes and skeletons in mysterious settings. From 1920 to 1924 Delvaux studied architecture and painting at the Académie des Beaux-Arts in Brussels. His early work was influenced by

Henri-Gustave Delvigne was a French army officer and inventor who designed innovative rifles and helped introduce the cylindrical bullet. Delvigne joined the French army as a youth and attained the rank of captain of the royal guard. In 1826 he introduced the Delvigne rifle, the powder chamber of

dema deity, any of several mythical ancestral beings of the Marind-anim of southern New Guinea, the centre of a body of mythology called the dema deity complex. The decisive act in dema myths is the slaying of a dema (ancestral) deity by the ancestral tribe. This act brings about the transition

Demades was an Athenian orator and diplomat who rose from humble origins to a leading place in politics through his vigorous speeches and shrewd ability to fathom popular opinion. Demades opposed Demosthenes’ attempt to arouse the Athenians against Philip II of Macedonia, but he fought against the

magnet: Magnetization process: Demagnetization and magnetic anisotropy. As far as domain rotation is concerned, there are two important factors to be considered, demagnetization and magnetic anisotropy (exhibition of different magnetic properties when measured along axes in different directions). The first of these concerns the shape of a magnetized…

Alain Mabanckou: Nonfiction and translations: …Demain j’aurai vingt ans (2010; Tomorrow I’ll Be Twenty, a finalist for the Man Booker Prize), written in the voice of the author at 10; and Lumières de Pointe-Noire (2013; The Lights of Pointe-Noire), described by one critic as “a dazzling meditation on homecoming and belonging.” Le Sanglot de l’homme…

Indonesia: Muslims in Java: …of the Islamic sultanate of Demak in the first half of the 16th century to rule over a great Javanese kingdom. Especially as their harbours grew richer and their dynasties older and more confident, the coastal princes came to see themselves not only as Muslim leaders but as Javanese royalty.…

Esther Boise Van Deman was an American archaeologist and the first woman to specialize in Roman field archaeology. She established lasting criteria for the dating of ancient constructions, which advanced the serious study of Roman architecture. Van Deman earned bachelor’s (1891) and master’s (1892)

Ralph Van Deman was an American intelligence officer, called “the father of American military intelligence.” Van Deman followed an eclectic educational course before settling on a military career: he took a degree from Harvard, studied law for a year, and then took a medical degree (1893). He

supply and demand, in economics, relationship between the quantity of a commodity that producers wish to sell at various prices and the quantity that consumers wish to buy. It is the main model of price determination used in economic theory. The price of a commodity is determined by the interaction

telecommunications media: Satellite links: …upon request—a process known as demand assigned multiple access (DAMA)—multibeam satellites can link widely distributed mobile and fixed users that cannot be linked economically by optical fibre cables or earthbound radio relays.

certificate of deposit: Two common types are demand certificates of deposit and time certificates of deposit.

demand curve, in economics, a graphic representation of the relationship between product price and the quantity of the product demanded. It is drawn with price on the vertical axis of the graph and quantity demanded on the horizontal axis. With few exceptions, the demand curve is delineated as

logistics: Demand forecasting: This activity is carried on in conjunction with the firm’s marketing staff and is used to obtain a better idea of the logistic needs of the next planning period. These needs include both delivery to customers and receipt of raw materials or components…

pacemaker: More-recent devices are synchronous, or demand, pacemakers that trigger heart contractions only when the normal beat is interrupted. Most pacemakers of this type are designed to generate a pulse when the natural heart rate falls below 68 to 72 beats per minute.

Thomas Demand is a German photographer known for his large-scale photographs of paper-and-cardboard reconstructions of indoor scenes. On initial viewing, the images appear to portray “real” settings, but closer inspection reveals that the scenes have been entirely fabricated. Through calculated

Thomas Demand is a German photographer known for his large-scale photographs of paper-and-cardboard reconstructions of indoor scenes. On initial viewing, the images appear to portray “real” settings, but closer inspection reveals that the scenes have been entirely fabricated. Through calculated

catalysis: Determination of the structure and properties of catalysts: …reactions have been called “demanding reactions.” The gain in selectivity appears to be largely because of a reduction in the rate of hydrogenolysis. Since other studies have shown that heating in vacuo to 900 °C tends to develop certain (111) facets of the metal, it is thought that the…

brown snake: The best-known species is the eastern brown snake (Pseudonaja textilis), which grows to about 2 metres (7 feet). Other species in the genus are the western brown snake or gwardar (P. nuchalis) and the dugite (P. affinis).

choral music: Cultivation of the dialogue: …were also cultivated successfully by Christoph Demantius, whose anthology of 1609 contains examples of memorable beauty and charm. In his Jungfrew, ich het ein’ Bitt’ an euch (Maiden, I have a Request for You), Demantius allows one four-part choir to represent the girl and the other the boy in a…

Uralian emerald, yellowish green or emerald-green andradite, a variety of garnet, not emerald. See

Demaratus was a king of Sparta, together with Cleomenes I, who frustrated Cleomenes’ designs on both Athens and Aegina. He was consequently dethroned by Cleomenes on a false charge of illegitimacy, upon which he fled to Persia and was given some small cities in northwestern Asia Minor, which his

europium: …in 1901 by French chemist Eugène-Anatole Demarçay and named for Europe. One of the least abundant rare earths (its concentration in Earth’s crust is nearly the same as bromine’s), it occurs in minute amounts in many rare-earth minerals such as monazite and bastnasite and also in the products of nuclear…

Carmen Basilio: …in which he knocked out Tony DeMarco in the 12th round to win the welterweight championship. He engaged in a November 30, 1955, rematch with DeMarco and again won on a 12th-round knockout.

Rascal Flatts: ), bassist Jay DeMarcus (in full Stanley Wayne DeMarcus, Jr.; b. April 26, 1971, Columbus), and guitarist Joe Don Rooney (b. September 13, 1975, Baxter Springs, Kansas).

Rascal Flatts: ), bassist Jay DeMarcus (in full Stanley Wayne DeMarcus, Jr.; b. April 26, 1971, Columbus), and guitarist Joe Don Rooney (b. September 13, 1975, Baxter Springs, Kansas).

elevator: This installation, in the Demarest Building in New York City, utilized an electric motor to drive a winding drum in the building’s basement. The introduction of electricity led to two further advances: in 1894 push-button controls were introduced, and in 1895 a hoisting apparatus was demonstrated in England that…

New Milford: In 1675 David Demarest (or des Marest), a French Huguenot, and his sons received a land grant, which included the former farm area. Two years later they established the first permanent settlement. Their mill, known as Demarest Landing, became a shipping point for iron ore. The home…

golf: U.S. tournaments and players: Jimmy Demaret. Snead, one of golf’s most humourous and ingratiating players, was recognized for the easy grace of his natural, self-taught swing. His 81 PGA Tour victories still stand as the all-time record for men (Kathy Whitworth holds the record for the most tour wins,…

Mount Damāvand, extinct volcanic peak of the Elburz Mountains in northern Iran, about 42 miles (68 km) northeast of Tehrān. Estimates of its height range from about 18,400 feet (5,610 metres) to 18,600 feet (5,670 metres); it dominates the surrounding ranges by 3,000 to 8,000 feet (900 to 2,450

African religions: Mythology: For the Ndembu of the Democratic Republic of the Congo, by contrast, twins represent an excess of fertility more characteristic of the animal world than the human, and rituals are undertaken to protect the community from this anomalous condition.

Henryk Dembiński was a Polish soldier and revolutionary leader. Dembiński was the chief military commander in the Polish revolt of 1830–31, and he served as commander in chief of the Hungarian army during the Hungarian revolution of 1848–49. Dembiński was a student at the Vienna Academy of

Henryk Dembiński was a Polish soldier and revolutionary leader. Dembiński was the chief military commander in the Polish revolt of 1830–31, and he served as commander in chief of the Hungarian army during the Hungarian revolution of 1848–49. Dembiński was a student at the Vienna Academy of

deme, in biology, a population of organisms within which the exchange of genes is completely random; i.e., all mating combinations between individuals of opposite sexes have the same probability of occurrence. The deme usually is not a closed population but contributes individuals to neighbouring

deme, in ancient Greece, country district or village, as distinct from a polis, or city-state. Dēmos also meant the common people (like the Latin plebs). In Cleisthenes’ democratic reform at Athens (508/507 bce), the demes of Attica (the area around Athens) were given status in local and state

Franz von Suppé was an Austrian composer of light operas. He greatly influenced the development of Austrian and German light music up to the middle of the 20th century. Suppé conducted at the Theater an der Wien, the Josephstadt, and other theatres in Vienna. His most successful comic operas were

dementia, general term for any of a number of conditions marked by chronic, usually progressive deterioration of intellectual capacity associated with the widespread loss of nerve cells and the shrinkage of brain tissue. People with dementia experience impairments in memory and learning, executive

Francis Ford Coppola: Early years: …bankroll his first directorial effort, Dementia 13 (1963), a gory horror film based on a script that Coppola had hastily written.

childhood disintegrative disorder (CDD), a rare neurobiological disorder characterized by the deterioration of language and social skills and by the loss of intellectual functioning following normal development throughout at least the initial two years of life. The disorder was first described in

paresis, psychosis caused by widespread destruction of brain tissue occurring in some cases of late syphilis. Mental changes include gradual deterioration of personality, impaired concentration and judgment, delusions, loss of memory, disorientation, and apathy or violent rages. Convulsions are n

schizophrenia, any of a group of severe mental disorders that have in common symptoms such as hallucinations, delusions, blunted emotions, disordered thinking, and a withdrawal from reality. Persons affected by schizophrenia display a wide array of symptoms. In the past, depending on the specific

Eugen Bleuler: …oder Gruppe der Schizophrenien (1911; Dementia Praecox; or, The Group of Schizophrenias). He argued in this monograph that dementia praecox was not a single disease, was not invariably incurable, and did not always progress to full dementia. Each of these conclusions was at odds with the accepted wisdom of the…

Eugen Bleuler: …oder Gruppe der Schizophrenien (1911; Dementia Praecox; or, The Group of Schizophrenias). He argued in this monograph that dementia praecox was not a single disease, was not invariably incurable, and did not always progress to full dementia. Each of these conclusions was at odds with the accepted wisdom of the…

chronic traumatic encephalopathy (CTE), degenerative brain disease typically associated with repetitive trauma to the head. Chronic traumatic encephalopathy (CTE) originally was known as dementia pugilistica, a term introduced in the 1920s and ’30s to describe mental and motor deficits associated

dementia with Lewy bodies, chronic, progressive disease characterized by the deterioration of intellectual capacity, particularly attention and visual and spatial processing, associated with the widespread loss of neurons in certain regions of the brain. It is the second most common form of

mental disorder: Senile and presenile dementia: In these dementias there is a progressive intellectual impairment that proceeds to lethargy, inactivity, and gross physical deterioration and eventually to death within a few years. Presenile dementias are arbitrarily defined as those that begin in persons under age 65. In…

Guyana: Early history: …until 1814, when they purchased Demerara, Berbice, and Essequibo, which in 1831 were united as the colony of British Guiana.

Demerara River, river in eastern Guyana that rises in the forests of central Guyana and flows northward without important tributaries for 215 miles (346 km) to the Atlantic Ocean at Georgetown. Its narrow estuary and rapid flow keep clear a direct channel of 16–20 feet (5–6 meters) to the ocean.

meperidine, synthetic drug used in the treatment of moderate to severe pain. It is an opioid analgesic, and thus its effects on the body resemble those of opium or morphine, one of opium’s purified constituents. A common trade name for meperidine is Demerol. The drug acts principally on the central

A Pulitzer Prize winner for poetry and the recipient of a MacArthur Foundation “genius grant,” Jericho Brown is known for poems that address themes of identity, racism, violence, queer sexuality, religious faith, and trauma. His work has been praised for its stark vulnerability and honesty as well

Eupolis: In his last play, The Demes, written just after the disastrous Athenian expedition led by Alcibiades to Sicily (412 bc), he addressed himself with patriotic fervour to the problem of how the fortunes of Athens were to be restored. He died young, about 410 bc, probably on active service…

demesne, in English feudal law, that portion of a manor not granted to freehold tenants but either retained by the lord for his own use and occupation or occupied by his villeins or leasehold tenants. When villein tenure developed into the more secure copyhold and leaseholders became protected

The Spell, allegorical novel by Hermann Broch, published posthumously in 1953 as Der Versucher. It was the only completed volume of a projected trilogy to have been called Bergroman (“Mountain Novel”). The author wrote it in the mid-1930s and then, dissatisfied, completely rewrote it twice more; by

Demeter, in Greek religion, daughter of the deities Cronus and Rhea, sister and consort of Zeus (the king of the gods), and goddess of agriculture. Her name indicates that she is a mother. Demeter is rarely mentioned by Homer, nor is she included among the Olympian gods, but the roots of her legend

Alfred, Lord Tennyson: Major literary work of Alfred, Lord Tennyson: …the same year he published Demeter and Other Poems, which contains the charming retrospective “To Mary Boyle,” “The Progress of Spring,” a fine lyric written much earlier and rediscovered, and “Merlin and the Gleam,” an allegorical summing-up of his poetic career. In 1892 his play The Foresters was successfully produced…

Western sculpture: Late Classical period (c. 400–323 bce): The Demeter of Cnidus (perhaps by the Athenian sculptor Leochares) is Classical in mood, but the features are Praxitelean, and, in the reliefs on the Mausoleum at Halicarnassus (on which both Scopas and Leochares are said to have worked), the vigour of the battle scenes is…

Vólos: …newly founded Macedonian town of Demetrias to the north of it.

Gioachino Rossini: Early years: …composed his first opera seria—Demetrio e Polibio (1806; staged in 1812)—for the Mombelli, a family of singers. At 15 he had learned the violin, horn, and harpsichord and had often sung in public, even in the theatre, to earn some money.

Italian literature: The veristi and other narrative writers: …for his setting and in Demetrio Pianelli (1890) has painted a candid but essentially kindly portrait of the new Milanese urban middle class. Antonio Fogazzaro was akin to the veristi in his powers of observation and in his descriptions of minor characters; but he was strongly influenced by Manzoni, and…

Dimitrios was the 269th ecumenical patriarch of the Eastern Orthodox church. After studying at the French lycée in the Galata district of Istanbul, Dimitrios Papadopoulos entered the Holy Trinity School of Theology on the island of Heybeli in the Sea of Marmara. He was ordained a priest in 1942,

Demetrios of Alopeka was a Greek sculptor, said by ancient critics to have been notable for the lifelike realism of his statues. His style was contrasted with that of Cresilas, an idealizing sculptor of the generation before. Demetrios mainly produced portrait statues, and his portrait of

Titus Quinctius Flamininus: …with the Senate to name Demetrius, Philip’s younger son, as his heir instead of his older son, Perseus. According to Polybius, Philip was shown a letter from Flamininus promising Demetrius the throne (though the Roman historian Livy expresses his belief that the letter was forged), and Philip reluctantly put Demetrius…

St. Clement of Alexandria: Early life and career: Led by Demetrius, the bishop of Alexandria who was elevated to the episcopacy in 189, they taught a legalistic doctrine of salvation and preached that the Christian was saved by faith (pistis).

Titus Andronicus: …mutilated by Tamora’s sadistic sons Demetrius and Chiron, who cut off her hands and cut out her tongue so that she will be unable to testify against them. She nonetheless manages, by holding a stick in her mouth and guiding it with the stumps of her hands, to reveal the…

Western painting: Etruscan and Hellenistic Greek influences: Tradition states that Demetrius, an Alexandrian “place painter” (topographos), was working in Rome by 164 bc. The exact meaning of his title is problematic, but it could mean that he painted landscapes, later to become a favourite motif in the decoration of Roman houses. Some Alexandrian tombs of…

fable, parable, and allegory: Fable: …already receded into legend when Demetrius of Phaleron, a rhetorician, compiled an edition of Aesop’s fables in the 4th century bc. The poetic resources of the form developed slowly. A versified Latin collection made by Phaedrus, a freed slave in the house of the Roman emperor Augustus, included fables invented…