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  • Eh (chemistry)

    mineral: Use in sedimentary petrology: …be expressed in terms of Eh (oxidation potential) and pH (the negative logarithm of the hydrogen ion concentration [H+]; a pH of 0–7 indicates acidity, a pH of 7–14 indicates basicity, and neutral solutions have a pH of 7).

  • Eh Joe! (work by Beckett)

    Samuel Beckett: The humour and mastery: The short television play Eh Joe! (1967) exploits the television camera’s ability to move in on a face and the particular character of small-screen drama. Finally, his film script Film (1967) creates an unforgettable sequence of images of the observed self trying to escape the eye of its own…

  • Eh-pH diagram (chemistry)

    Eh–pH diagram, any of a class of diagrams that illustrate the fields of stability of mineral or chemical species in terms of the activity of hydrogen ions (pH) and the activity of electrons (Eh). Consequently, the reactions illustrated on Eh–pH diagrams involve either proton transfer (e.g.,

  • eHarmony (American company)

    EHarmony, American company providing online personal-relationship and matchmaking services. Founded in 2000 by Neil Clark Warren, a clinical psychologist, eHarmony is based in Pasadena, Calif. The company aims to unite compatible individuals in long-term relationships via scientific methods. After

  • Ehe der Maria Braun, Die (film by Fassbinder [1979])

    Rainer Werner Fassbinder: …Ehe der Maria Braun (1979; The Marriage of Maria Braun), an ironic portrait of a marriage that reflects German history from World War II to the “economic miracle” of the 1950s; Lola (1981), Fassbinder’s version of the Blue Angel legend; and Der Sehnsucht der Veronika Voss (1982; Veronika Voss), based…

  • Ehe des Herrn Mississippi, Die (work by Dürrenmatt)

    Friedrich Dürrenmatt: …in the United States as Fools Are Passing Through in 1958. Among the plays that followed were Der Besuch der alten Dame (1956; The Visit); Die Physiker (1962; The Physicists), a modern morality play about science, generally considered his best play; Der Meteor (1966; The Meteor); and Portr?t eines Planeten…

  • eHealth (health care)

    E-health, use of digital technologies and telecommunications, such as computers, the Internet, and mobile devices, to facilitate health improvement and health care services. E-health is often used alongside traditional “off-line” (non-digital) approaches for the delivery of information directed to

  • EHEC (bacterium)

    German E. coli outbreak of 2011: E. coli O104:H4: coli (EIEC), enterohemorrhagic E. coli (EHEC), enteropathogenic E. coli (EPEC), enteroaggregative E. coli (EAEC), and diffusely adherent E. coli (DAEC). The causative EAEC O104:H4 bacterium of the 2011 outbreak was initially described as a strain of EHEC, but subsequent genetic analyses revealed that it was closely related…

  • Ehécatl (Mesoamerican god)

    Quetzalcóatl, (from Nahuatl quetzalli, “tail feather of the quetzal bird [Pharomachrus mocinno],” and coatl, “snake”), the Feathered Serpent, one of the major deities of the ancient Mexican pantheon. Representations of a feathered snake occur as early as the Teotihuacán civilization (3rd to 8th

  • Ehemaligen SS-Angeh?rigen, Organisation der (German organization)

    Odessa, (German: “Organization of Former SS Members”), clandestine escape organization of the SS (q.v.) underground, founded probably in early 1947 in Germany. A large organizational network was set up to help former SS and Gestapo members and other high Nazi functionaries to avoid arrest, to a

  • EHF (frequency band)

    telecommunications media: The radio-frequency spectrum: …to extremely high frequency (EHF), ending at 300 gigahertz.

  • Ehime (prefecture, Japan)

    Ehime, prefecture (ken), northwestern Shikoku, Japan, facing the Inland Sea (north) and Bungo Strait (west). The interior is mountainous, and most of the population is grouped on the shallow coastal plains. Matsuyama, on the western coast, is the prefectural capital. Crops grown on terraced

  • E?kalī (dialect)

    South Arabian languages: Dialects include Mahrī (Mehri), Sha?rī (E?kalī; Jibbali), ?arsūsī, and Ba??arī on the Arabian shore of the Indian Ocean and Soqo?rī on Socotra. ?arsūsī has been influenced by Arabic, a northern Arabian language, to a greater extent than have the other dialects. These languages lack a tradition of writing, and…

  • Ehlers-Danlos syndrome (genetic disorder)

    Ehlers-Danlos syndrome, rare, heritable disorder characterized by great elasticity of the skin, skin fragility with a tendency to hemorrhage, poor scar formation, and hyperextensibility of the joints (“elastic men”). The skin is velvety and bruises easily, and the ears tend to droop; dislocations

  • Ehlsheimer, Adam (German artist)

    Adam Elsheimer, German painter and printmaker, recognized as an important figure in the development of 17th-century landscape painting, noted especially for his atmospheric use of light. Elsheimer studied with Philipp Uffenbach in Frankfurt, where he learned the basic techniques of German

  • Ehmann, Freda (German businesswoman)

    Freda Ehmann, German businesswoman known as the “mother of the California ripe olive industry” for her contributions to the olive industry in the late 19th century. Ehmann made her mark late in life. At age 56 she was poor and recently widowed. Her only asset was a 20-acre (8-hectare) orchard of

  • EHR (medicine)

    Electronic health record (EHR), computer- and telecommunication-based system capable of housing and sharing patient health information, including data on patient history, medications, test results, and demographics. The technical infrastructure of electronic health records (EHRs) varies according

  • Ehre Gottes aus der Natur, Die (work by Gellert)

    Christian Fürchtegott Gellert: …the Eternal Glories”) and “Die Ehre Gottes aus der Natur” (“The Glory of God in Nature”), were later set to music by Beethoven and still appear in hymnbooks. Gellert also wrote a sentimental novel, Das Leben der schwedischen Gr?fin von G (1748; “The Life of the Swedish Countess of…

  • Ehre, Die (work by Sudermann)

    Hermann Sudermann: , What Money Cannot Buy), first performed in Berlin on Nov. 27, 1889, was a milestone in the naturalist movement, although to later critics it seemed a rather trite and slick treatment of class conflicts in Berlin. Heimat (performed 1893; Eng. trans., Magda) carried his fame…

  • Ehrenberg, Christian Gottfried (German biologist)

    Christian Gottfried Ehrenberg, German biologist, microscopist, scientific explorer, and a founder of micropaleontology—the study of fossil microorganisms. Ehrenberg studied at the University of Berlin (M.D., 1818) and was associated with the university throughout his career. He took part in a

  • Ehrenberg, Israel (American anthropologist, writer and humanist)

    Ashley Montagu, British American anthropologist noted for his works popularizing anthropology and science. Montagu studied at the University of London and the University of Florence and received his Ph.D. from Columbia University, New York City, in 1937. He lectured and taught at a number of

  • Ehrenbreitstein Fortress (fortress, Koblenz, Germany)

    Koblenz: The Ehrenbreitstein Fortress and suburb across the Rhine were incorporated into Koblenz in 1937. A castle, first built on the site in the 11th century, passed to the archbishops of Trier in the 12th century; destroyed by the French in 1801 after a four-year siege, it…

  • Ehrenburg, Ilya Grigoryevich (Soviet author)

    Ilya Grigoryevich Ehrenburg, prolific writer and journalist, one of the most effective Soviet spokesmen to the Western world. Born into a middle-class Jewish family that later moved to Moscow, Ehrenburg became involved as a youth in revolutionary activity and was arrested in his early teens. He

  • Ehrenfels, Christian, Freiherr von (Austrian philosopher)

    Christian, Freiherr (baron) von Ehrenfels, Austrian philosopher remembered for his introduction of the term Gestalt (“figure”) into psychology and for his contribution to value theory. As a student at the University of Vienna, Ehrenfels came under the influence of Franz Brentano and Alexius

  • Ehrenfest model of diffusion (mathematics)

    probability theory: The Ehrenfest model of diffusion: The Ehrenfest model of diffusion (named after the Austrian Dutch physicist Paul Ehrenfest) was proposed in the early 1900s in order to illuminate the statistical interpretation of the second law of thermodynamics, that the entropy of a closed system can only…

  • Ehrenfest, Paul (Austrian theoretical physicist)

    Paul Ehrenfest, Austrian theoretical physicist who helped clarify the foundations of quantum theory and statistical mechanics. Ehrenfest studied with Ludwig Boltzmann at the University of Vienna, where he received his doctorate in 1904. Ehrenfest and his wife, Russian mathematician Tatiana A.

  • Ehrenfest, Tatiana (Russian mathematician)

    Paul Ehrenfest: …and his wife, Russian mathematician Tatiana A. Afanassjewa, renounced their religions (Judaism and Christianity, respectively) because such interconfessional marriages were not allowed in Austro-Hungary. Having seriously complicated their chances to find regular academic positions, the couple moved to St. Petersburg, Russia, where they subsisted on temporary teaching incomes between 1907…

  • Ehrenreich, Johann Eberhard Ludwig (pottery manufacturer)

    Marieberg pottery: …the Marieberg factory, founded by Johann Eberhard Ludwig Ehrenreich, encountered financial difficulties in 1766, Ehrenreich was succeeded by the Frenchman Pierre Berthevin. In 1769 Berthevin left and Henrik Sten became director. In 1782 Marieberg was sold to its rival R?rstrand, and in 1788 it closed.

  • Ehrharta erecta (wild grass)

    George Ledyard Stebbins, Jr.: …of which the new species Ehrharta erecta was established in a natural environment in 1944.

  • Ehringsdorf remains (human fossil)

    Ehringsdorf remains, human fossils found between 1908 and 1925 near Weimar, Germany. The most complete fossils consist of a fragmented braincase and lower jaw of an adult and the lower jaw, trunk, and arm bones of a child. The skull was found along with elephant, rhinoceros, horse, and bovid fossil

  • Ehrlich, Eugen (Austrian legal scholar)

    Eugen Ehrlich, Austrian legal scholar and teacher generally credited with founding the discipline of the sociology of law. Educated in law at the University of Vienna, Ehrlich taught there for several years and then served as associate professor of Roman law at the University of Czernowitz

  • Ehrlich, Paul (German medical scientist)

    Paul Ehrlich, German medical scientist known for his pioneering work in hematology, immunology, and chemotherapy and for his discovery of the first effective treatment for syphilis. He received jointly with élie Metchnikoff the Nobel Prize for Physiology or Medicine in 1908. Ehrlich was born into a

  • Ehrlich, Paul R. (American biologist and educator)

    Paul R. Ehrlich, American biologist and educator who in 1990 shared Sweden’s Crafoord Prize (established in 1980 and awarded by the Royal Swedish Academy of Sciences, to support those areas of science not covered by the Nobel Prizes) with biologist E.O. Wilson. Ehrlich received early inspiration to

  • Ehrlich, Paul Ralph (American biologist and educator)

    Paul R. Ehrlich, American biologist and educator who in 1990 shared Sweden’s Crafoord Prize (established in 1980 and awarded by the Royal Swedish Academy of Sciences, to support those areas of science not covered by the Nobel Prizes) with biologist E.O. Wilson. Ehrlich received early inspiration to

  • Ehrlichman, John D. (United States political adviser)

    John D. Ehrlichman, assistant for domestic affairs during the administration of U.S. Pres. Richard M. Nixon, was best known for his participation in the Watergate scandal that led to Nixon’s resignation. Ehrlichman grew up in Washington and California and held several jobs before enlisting in the

  • Ehrlichman, John Daniel (United States political adviser)

    John D. Ehrlichman, assistant for domestic affairs during the administration of U.S. Pres. Richard M. Nixon, was best known for his participation in the Watergate scandal that led to Nixon’s resignation. Ehrlichman grew up in Washington and California and held several jobs before enlisting in the

  • Ehrling, Evert Sixten (Swedish conductor)

    Sixten Ehrling, Swedish conductor (born April 3, 1918, Malm?, Swed.—died Feb. 13, 2005, New York, N.Y.), directed orchestras with passion and precision; known for his high standards and fiery temper, Ehrling was unapologetic when criticized for the way he conducted or for beginning a concert b

  • ehrpat (Zoroastrian priest)

    Zoroastrianism: Priesthood: …of the word, herbad or ervad, designates a priest of the lower degree, who in the more important ceremonies only acts as the assistant priest. Above him is the mobed. Ranked above all of these functionaries is the dastūr, a kind of bishop, who directs and administers one or more…

  • Ehud (biblical figure)

    Ehud, in the Old Testament (Judges 3:12–4:1), son of Gera, the Benjaminite, Israelite hero who delivered Israel from 18 years of oppression by the Moabites. A left-handed man, Ehud tricked Eglon, king of Moab, and killed him. He then led the tribe of Ephraim to seize the fords of the Jordan, w

  • ei-raku (coin)

    coin: Japan: The ei-raku and bun-kyū sen of the 19th century were the only other regular copper coins. Unlike China, Japan has had a gold and silver coinage since the 16th century. The gold coins are large flat pieces in the shape of rectangles with rounded corners, the…

  • EIA (pathology)

    Equine infectious anemia (EIA), disease of horses that is caused by a non-oncogenic (non-cancer-causing) retrovirus. Bloodsucking insects, especially horseflies, transmit the disease. Signs, which appear about two weeks after exposure, include fever, progressive weakness, weight loss, edema, and

  • Eibar (Spain)

    Eibar, city, Guipúzcoa provincia (province), in the comunidad autónoma (autonomous community) of Basque Country, northern Spain, lying east of Bilbao on the Bilbao–San Sebastián railway. The city was chartered by Alfonso XI of Castile in 1346. Its chief industry since the 16th century has been the

  • Eibl-Eibesfeldt, Iren?us (Austrian ethologist)

    motivation: Genetic contributions: …these is the Austrian ethologist Iren?us Eibl-Eibesfeldt. In a book entitled Love and Hate: The Natural History of Behavior Patterns, he summarized many years of cross-cultural research on human genetic behaviour patterns. Interestingly, research on the facial expressions associated with emotion has provided some support for the existence of innate…

  • Eichelberger, Robert L. (United States general)

    Robert L. Eichelberger, U.S. Army general who during World War II retrieved strategic Japanese-held islands, thus helping to end the war in the Pacific. A 1909 graduate of the U.S. Military Academy at West Point, New York, Eichelberger served with the American Expeditionary Force in Siberia during

  • Eichelberger, Robert Lawrence (United States general)

    Robert L. Eichelberger, U.S. Army general who during World War II retrieved strategic Japanese-held islands, thus helping to end the war in the Pacific. A 1909 graduate of the U.S. Military Academy at West Point, New York, Eichelberger served with the American Expeditionary Force in Siberia during

  • Eichendorff, Joseph, Freiherr von (German writer)

    Joseph, baron von Eichendorff, poet and novelist, considered one of the great German Romantic lyricists. From a family of Silesian nobility, Eichendorff studied law at Heidelberg (1807), where he published his first verse and became acquainted with the circle of Romantics. Continuing his studies in

  • Eichhorn, Johann Gottfried (German biblical scholar)

    Johann Gottfried Eichhorn, German biblical scholar and orientalist who taught at Jena and G?ttingen, one of the first commentators to make a scientific comparison between the biblical books and other Semitic writings. A pioneer in distinguishing the various documentary and cultural sources of the

  • Eichhornia (plant)

    Water hyacinth, any aquatic plant of the genus Eichhornia of the pickerelweed family (Pontederiaceae), consisting of about five species, native primarily to tropical America. Some species float in shallow water; others are rooted in muddy stream banks and lakeshores. All have slender rootstocks,

  • Eichhornia crassipes (plant)

    water hyacinth: The common water hyacinth (E. crassipes) is the most widely distributed species. Its leafstalk is spongy and inflated, and the upper lobes of the purple flowers have blue and yellow markings. It reproduces quickly and often clogs slow-flowing streams. It is used as an ornamental in…

  • Eichler, August Wilhelm (German botanist)

    August Wilhelm Eichler, German botanist who developed one of the first widely used natural systems of plant classification. Eichler studied mathematics and natural science at the University of Marburg (Ph.D., 1861). He then went to Munich, where he became a private assistant to the naturalist Karl

  • Eichmann in Jerusalem (work by Arendt)

    Hannah Arendt: In a highly controversial work, Eichmann in Jerusalem (1963), based on her reportage of the trial of the Nazi war criminal Adolf Eichmann in 1961, Arendt argued that Eichmann’s crimes resulted not from a wicked or depraved character but from sheer “thoughtlessness”: he was simply an ambitious bureaucrat who failed…

  • Eichmann, Adolf (German military official)

    Adolf Eichmann, German high official who was hanged by the State of Israel for his part in the Holocaust, the Nazi extermination of Jews during World War II. During World War I, Eichmann’s family moved from Germany to Linz, Austria. His pre-Nazi life was rather ordinary. He worked as a traveling

  • Eichmann, Karl Adolf (German military official)

    Adolf Eichmann, German high official who was hanged by the State of Israel for his part in the Holocaust, the Nazi extermination of Jews during World War II. During World War I, Eichmann’s family moved from Germany to Linz, Austria. His pre-Nazi life was rather ordinary. He worked as a traveling

  • Eichrodt, Walther (German biblical scholar)

    Walther Eichrodt, German scholar who showed the importance to biblical studies of an understanding of the theology of the Old Testament. After studying theology at Bethel, Greifswald, Heidelberg, and Erlangen, Eichrodt taught at Bethel and Erlangen, then became professor of Old Testament at the

  • Eicones plantarum seu stirpium (work by Tabernaemontanus)

    John Gerard: …came from Jacob Theodorus Tabernaemontanus’ Eicones plantarum seu stirpium (1590).

  • eicosanoic acid (chemical compound)

    carboxylic acid: Unsaturated aliphatic acids: …the saturated stearic (C18) and arachidic (C20) acids, which are solids. The reason is that the regular nature of the saturated hydrocarbon chains allows the molecules in the solid to stack in a close parallel arrangement, while the presence of cis double bonds in the unsaturated hydrocarbon chains breaks up…

  • eicosanoid (chemical compound)

    lipid: Eicosanoids: Three types of locally acting signaling molecules are derived biosynthetically from C20 polyunsaturated fatty acids, principally arachidonic acid. Twenty-carbon fatty acids are all known collectively as eicosanoic acids. The three chemically similar classes are prostaglandins, thromboxanes, and leukotrienes. The eicosanoids interact with specific cell…

  • eicosapentaenoic acid (chemical compound)

    human nutrition: Meat, fish, and eggs: …essential long-chain fatty acids, particularly eicosapentaenoic acid.

  • Eid al-Adha (Islamic festival)

    Eid al-Adha, (Arabic: “Festival of Sacrifice”) the second of two great Muslim festivals, the other being Eid al-Fitr. Eid al-Adha marks the culmination of the hajj (pilgrimage) rites at Minā, Saudi Arabia, near Mecca, but is celebrated by Muslims throughout the world. As with Eid al-Fitr, it is

  • Eid al-Fitr (Islamic festival)

    Eid al-Fitr, (Arabic: “Festival of Breaking Fast”) first of two canonical festivals of Islam. Eid al-Fitr marks the end of Ramadan, the Muslim holy month of fasting, and is celebrated during the first three days of Shawwal, the 10th month of the Islamic calendar (though the Muslim use of a lunar

  • eider (bird)

    Eider, any of several large sea ducks variously classified as members of the tribe Mergini or placed in a separate tribe Somateriini (family Anatidae, order Anseriformes). Eiders are heavy and round-bodied, with humped bills that produce the bird’s characteristic sloping profile. They are the

  • Eider Canal (canal, Germany)

    Kiel Canal, waterway in northern Germany, extending eastward for 98 km (61 miles) from Brunsbüttelkoog (on the North Sea, at the mouth of the Elbe River) to Holtenau (at Kiel Harbour on the Baltic Sea). The canal has been enlarged twice and is today 160 metres (526 feet) wide and 11 metres (37

  • Eider Program (Danish political policy)

    Eider Program, (1848–64), the domestic and foreign policy cornerstone of Denmark’s National Liberal governments during the Schleswig-Holstein crises. The program, which called for the incorporation of the duchy of Schleswig into Denmark, was brought to an end by the German occupation of both

  • Eider River (river, Germany)

    Eider River, river, Schleswig-Holstein Land (state), northern Germany. It rises in the hills south of Kiel, flows through Westensee (West Lake) northward to a point northwest of Kiel, and then bends westward and flows across the low peninsula in a sluggish, winding course of 117 miles (188 km) to

  • eiderdown

    duck: Eiderdown, the down feathers of the common eider (Somateria mollissima), are still of wide commercial value for use in luxury quilts and pillows.

  • Eidesleistung der Juden, Die (work by Frankel)

    Zacharias Frankel: Frankel’s first major work, Die Eidesleistung der Juden (1840; “Oath-Taking by Jews”), attacked discrimination against Jews who testified in courts in Saxony. It effectively helped disprove the notion that Jews were untrustworthy in swearing oaths. Frankel also published Vorstudien zur Septuaginta (1841; “Preliminary Studies in the Septuagint”), in which…

  • eidetic image (visual phenomenon)

    Eidetic imagery, an unusually vivid subjective visual phenomenon. An eidetic person claims to continue to “see” an object that is no longer objectively present. Eidetic persons behave as if they are actually seeing an item, either with their eyes closed or while looking at some surface that serves

  • eidetic imagery (visual phenomenon)

    Eidetic imagery, an unusually vivid subjective visual phenomenon. An eidetic person claims to continue to “see” an object that is no longer objectively present. Eidetic persons behave as if they are actually seeing an item, either with their eyes closed or while looking at some surface that serves

  • eidetic reduction (philosophy)

    Eidetic reduction, in phenomenology, a method by which the philosopher moves from the consciousness of individual and concrete objects to the transempirical realm of pure essences and thus achieves an intuition of the eidos (Greek: “shape”) of a thing—i.e., of what it is in its invariable and

  • eidgenossen (Swiss military combatants)

    Battle of Morgarten: …the rise of the Swiss eidgenossen (“oath brothers”) as the most ferocious shock combatants in Europe. Because of the prestige won by Schwyz in the battle, the confederation as a whole became known by forms of this name (e.g., Schweiz [German], Suisse [French], Svizzera [Italian], or Switzerland).

  • Eidguenots (Swiss political organization)

    Philibert Berthelier: …the Genevese anti-Savoyard faction (Eidguenots) that struggled against the powerful duke of Savoy, Charles III, to maintain the independence of Geneva.

  • Eidophusikon (theatre)

    Philip James de Loutherbourg: His Eidophusikon, a miniature theatre, demonstrated these techniques in a smaller, more controlled environment.

  • eidos (philosophy)

    Form, the external shape, appearance, or configuration of an object, in contradistinction to the matter of which it is composed; in Aristotelian metaphysics, the active, determining principle of a thing as distinguished from matter, the potential principle. The word form has been used in a number

  • Eidsvoll constitution of 1814 (Norwegian history)

    Norway: Parliamentary authority: The Eidsvoll constitution of 1814 gave the Storting greater authority than parliamentary bodies had in any other country except the United States. The king retained executive power and chose his own ministers, but legislation, the imposition of taxes, and the budget were within the authority of…

  • Eidurinn (work by Erlingsson)

    Thorsteinn Erlingsson: …were Thyrnar (1897; “Thorns”) and Eidurinn (1913; “The Oath”). Thyrnar is a collection of poems ranging from love lyrics to political satire. Eidurinn is a moving poem sequence that interprets the 17th-century tragic love story of Ragnheidur, the defiant daughter of Bishop Brynjólfur Sveinsson of Skálholt, who gives birth to…

  • Eielsen, Elling (Norwegian-American religious leader)

    Protestantism: North America: …one of their first leaders, Elling Eielsen (1804–83), was an extremely legalistic lay follower of Hans Nielsen Hauge (1771–1824), a Norwegian Pietist who criticized the established church and stressed daily work as a divine calling. The Danish immigrants, fewer in number, eventually split over the question of Pietism. The anti-Pietists…

  • Eielson, Carl Ben (American aviator and explorer)

    Carl Ben Eielson, American aviator and explorer who was a pioneer of air travel in Alaska and the polar regions. He and Australian-British polar explorer Sir George Hubert Wilkins made the first transpolar flight across the Arctic in an airplane, as well as the first airplane flight over a portion

  • Eielson, Carl Benjamin (American aviator and explorer)

    Carl Ben Eielson, American aviator and explorer who was a pioneer of air travel in Alaska and the polar regions. He and Australian-British polar explorer Sir George Hubert Wilkins made the first transpolar flight across the Arctic in an airplane, as well as the first airplane flight over a portion

  • Eiermann, Egon (German architect)

    Egon Eiermann, one of the most prominent German architects to emerge after World War II, whose wide variety of buildings have been admired for their elegant proportions, precise detail, and structural clarity. Eiermann studied at Berlin Technical University under Hans Poelzig, later working in the

  • Eifel (region, Germany)

    Eifel, plateau region of western Germany, lying between the Rhine and Mosel (French: Moselle) rivers and the Luxembourg and Belgian frontiers. Continuous with the Ardennes and the Hohes Venn (French: Haute Fagnes) of Belgium, the German plateau falls into three sections: Schneifel or Schnee-Eifel,

  • Eifelian Stage (geology and stratigraphy)

    Eifelian Stage, lowermost of the two standard worldwide divisions of Middle Devonian rocks and time. Eifelian time spans the interval between 393.3 million and 387.7 million years ago. The name of the Eifelian Stage is derived from the Eifel Hills in western Germany, near Luxembourg and Belgium. As

  • Eiffel Tower (tower, Paris, France)

    Eiffel Tower, Parisian landmark that is also a technological masterpiece in building-construction history. When the French government was organizing the International Exposition of 1889 to celebrate the centenary of the French Revolution, a competition was held for designs for a suitable monument.

  • Eiffel, Alexandre-Gustave (French engineer)

    Gustave Eiffel, French civil engineer renowned for the tower in Paris that bears his name. After graduation from the College of Art and Manufacturing in 1855, Eiffel began to specialize in metal construction, especially bridges. He directed the erection of an iron bridge at Bordeaux in 1858,

  • Eiffel, Gustave (French engineer)

    Gustave Eiffel, French civil engineer renowned for the tower in Paris that bears his name. After graduation from the College of Art and Manufacturing in 1855, Eiffel began to specialize in metal construction, especially bridges. He directed the erection of an iron bridge at Bordeaux in 1858,

  • Eiffel, Tour (tower, Paris, France)

    Eiffel Tower, Parisian landmark that is also a technological masterpiece in building-construction history. When the French government was organizing the International Exposition of 1889 to celebrate the centenary of the French Revolution, a competition was held for designs for a suitable monument.

  • Eiga monogatari (Japanese literature)

    Fujiwara Family: Peak of Fujiwara power and glory.: …romance, the Eiga monogatari (A Tale of Flowering Fortunes, 1980), by an unknown author.

  • Eigen, Manfred (German physicist)

    Manfred Eigen, German physicist who was corecipient, with Ronald George Wreyford Norrish and George Porter, of the 1967 Nobel Prize for Chemistry for work on extremely rapid chemical reactions. Eigen was educated in physics and chemistry at the University of G?ttingen (Ph.D., 1951). He worked at

  • eigenfunction (mathematics)

    Sturm-Liouville problem: …a family of solutions, called eigenfunctions, corresponding to the eigenvalue solutions.

  • eigenstate (atomic physics)

    Energy state, in physics, any discrete value from a set of values of total energy for a subatomic particle confined by a force to a limited space or for a system of such particles, such as an atom or a nucleus. A particular hydrogen atom, for example, may exist in any of several configurations, e

  • eigenvalue (mathematics)

    Eigenvalue, one of a set of discrete values of a parameter, k, in an equation of the form Pψ = kψ, in which P is a linear operator (that is, a symbol denoting a linear operation to be performed), for which there are solutions satisfying given boundary conditions. The symbol ψ (psi) represents an

  • eigenvalue problem (mathematics)

    Sturm-Liouville problem, in mathematics, a certain class of partial differential equations (PDEs) subject to extra constraints, known as boundary values, on the solutions. Such equations are common in both classical physics (e.g., thermal conduction) and quantum mechanics (e.g., Schr?dinger

  • eigenvector (mathematics)

    linear algebra: Eigenvectors: When studying linear transformations, it is extremely useful to find nonzero vectors whose direction is left unchanged by the transformation. These are called eigenvectors (also known as characteristic vectors). If v is an eigenvector for the linear transformation T, then T(v) = λv for…

  • eight (number)

    October: …from octo, Latin for “eight,” an indication of its position in the early Roman calendar.

  • eight ball (game)

    Eight ball, popular American pocket-billiards game in which 15 balls numbered consecutively and a white cue ball are used. Those numbered 1–7 are solid colours; 9–15 are white with a single thick stripe in varying colours; and the eight ball is black. To begin, the balls are racked in a pyramid

  • Eight Banners (Chinese history)

    Abahai: …military machine known as the Eight Banners. After four expeditions he finally occupied the formerly Chinese-controlled Amur region of northern Manchuria and three times broke through the Great Wall on raids into North China.

  • Eight Eccentrics of Yang-chou (Chinese painters)

    Eight Eccentrics of Yangzhou, Chinese painters who worked in the area of Yangzhou, in Jiangsu province, during the Qianlong era (1735–96) of the Qing dynasty. The group includes Jin Nong, Huang Shen, Gao Xiang, Li Fangying, Li Shan, Luo Ping, and Wang Shishen. Other artists, such as Gao Fenghan,

  • Eight Eccentrics of Yangzhou (Chinese painters)

    Eight Eccentrics of Yangzhou, Chinese painters who worked in the area of Yangzhou, in Jiangsu province, during the Qianlong era (1735–96) of the Qing dynasty. The group includes Jin Nong, Huang Shen, Gao Xiang, Li Fangying, Li Shan, Luo Ping, and Wang Shishen. Other artists, such as Gao Fenghan,

  • Eight Immortals (Daoism)

    Baxian, heterogeneous group of holy Daoists, each of whom earned the right to immortality and had free access to the Peach Festival of Xiwangmu, Queen Mother of the West. Though unacquainted in real life, the eight are frequently depicted as a group—bearing gifts, for instance, to Shouxing, god of

  • Eight Masters of Nanjing (Chinese artists)

    Eight Masters of Nanjing, group of Chinese artists who lived and worked during the late 17th century in Nanjing (known as Jinling during the early Tang dynasty, c. 7th century). Although their group identity derives largely from the locale in which they worked, certain aesthetic similarities are

  • Eight Masters of Nanking (Chinese artists)

    Eight Masters of Nanjing, group of Chinese artists who lived and worked during the late 17th century in Nanjing (known as Jinling during the early Tang dynasty, c. 7th century). Although their group identity derives largely from the locale in which they worked, certain aesthetic similarities are

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