ABCDEFGHIJKLMNOPQRSTUVWXYZ0-9
Oread ... organized resistance movement
Oread
(from the article "nymph") ...of nature with which they were connected. The Oceanids, for example, were sea nymphs; the Nereids inhabited both saltwater and freshwater; the Naiads presided over springs, rivers, and lakes. The ...
Oreaster reticulatus
(from the article "sea star") ...throughout the Northern Hemisphere have longer, more pointed, spine-fringed arms; among these genera are Astropecten, Psilaster, and Luidia. The largest West Indies sea star, Oreaster reticulatus, is sometimes 50 cm ...
Orebro
lan (county) of south-central Sweden. It extends from the Bergslagen mining region in the north to Lake Hjalmar in the east and Lake Vatter in the south. It comprises the ...
Orebro
town and capital of Orebro lan (county), south-central Sweden. Orebro lies along the Svartan River at its entrance into Lake Hjalmar. One of Sweden's oldest towns, it was already a ...
oregano
flavourful dried leaves and flowering tops of any of various perennial herbs of the mint family (Lamiaceae, or Labiatae), particularly Origanum vulgare, called wild marjoram in northern and central Europe, ... [1 Related Articles]
Oregon
constituent state of the United States of America. To the north of the state's 97,073 square miles (251,419 square kilometres) of land and inland water lies Washington, from which Oregon ... [18 Related Articles]
Oregon
city, seat (1836) of Ogle county, northern Illinois, U.S. It lies on the Rock River, about 95 miles (155 km) west of Chicago. Early inhabitants of the region included Potawatomi ...
Oregon ash
(from the article "ash") ...the handles of shovels, spades, hoes, rakes, and other agricultural tools. The black ash (F. nigra) of eastern North America, the blue ash (F. quadrangulata) of the Midwest, and the ...
Oregon Ballet Theatre
(from the article "Performing Arts") ...at Houston Ballet. As the year proceeded, the Tchaikovsky Ballet from Perm, Russia, toured the U.S. with its recently acquired staging by ballerina Natalia Makarova, and Christopher Stowell gave his ...
Oregon Caves National Monument
cave complex in the Siskiyou Mountains of southwestern Oregon, U.S., near the California border. Established in 1909, the monument occupies a surface area of 0.8 square mile (2 square km). ...
Oregon City
city, seat (1843) of Clackamas county, northwestern Oregon, U.S., at Willamette Falls (40 feet [12 metres] high) and the juncture of the Clackamas and Willamette rivers. It forms part of ...
Oregon Country
(from the article "Idaho") ...in Oregon country, which was claimed first by Spain and then by Russia, Great Britain, and the United States; after the latter two had settled on the 49th parallel as ...
Oregon crab
(from the article "crab apple") ...crab (M. baccata), Toringo crab (M. sieboldii), and Japanese crab (M. floribunda). Among the notable American species are the garland, or wild sweet crab (M. coronaria); Oregon crab (M. fusca); ...
Oregon grape
any of several species of the genus Mahonia, evergreen shrubs of the barberry family (Berberidaceae) grown for their ornamental value. M. aquifolium, the typical Oregon grape, is 90 cm (3 ...
Oregon Health and Science University
public, coeducational institution of higher learning in Portland, Oregon, U.S. It is specifically dedicated to biomedical research and patient medical care and to training health professionals, scientists, and engineers. The ...
Oregon maple
(from the article "maple") Large maples, usually in excess of 30 metres high, that are much planted for shade include the sugar (A. saccharum), silver (A. saccharinum), and red (A. rubrum) maples. The Oregon, ...
Oregon Question
(from the article "Buchanan, James") ...and subsequent Mexican War took place during Buchanan's tenure as secretary of state. Buchanan's role in the war was limited, but he played a more active part in the border ...
Oregon Shakespeare Festival
(from the article "Performing Arts") Also in the regions, news was made by the appointment of a new artistic director for the flagship Oregon Shakespeare Festival in Ashland. Pathbreaking director Bill Rauch, who cofounded the ...
Oregon State University
public, coeducational institution of higher learning in Corvallis, Oregon, U.S. It is a comprehensive research university with land-, sea-, and space-grant status and awards undergraduate, graduate, and professional degrees. The ...
Oregon swallowtail butterfly
(from the article "community ecology") ...on plants in the carrot family Apiaceae (also called Umbelliferae), with different populations feeding on different plant species. However, one species within this group, the Oregon swallowtail (Papilio oregonius), has ...
Oregon System
(from the article "Oregon") The state constitution was adopted in 1857. Oregon has been in the vanguard of several innovative movements in U.S. government collectively known as the Oregon System. In 1902 the concepts ...
Oregon Trail
in U.S. history, one of the great emigrant routes to the Northwest, running from Independence, Mo., to the Columbia River region of Oregon. It crossed about 2,000 miles (3,200 km) ... [3 Related Articles]
Oregon Treaty
(from the article "Polk, James K.") ...retention of undistributed imports; and the passage of the Walker Tariff Act of 1846, which lowered import duties and did much to pacify British public opinion that had been inflamed ...
Oregon v. Guzek
(from the article "Law") ...with a history of violent behaviour. The court expressly left unresolved whether a defendant had a constitutional right to challenge his or her conviction on the ground of actual innocence. ...
Oregon white oak
(from the article "white oak") ...drooping branches, many-lobed dark green leaves, and distinctive acorns about 5 cm (1.7 inches) long. The ash-gray to light-brown bark, slightly orange-tinted, is fissured into irregular cubes. The Oregon white ...
Oregon, flag of
U.S. state flag consisting of a dark blue field (background) with the phrase "State of Oregon," the date 1859, and an emblem in golden yellow on the obverse side; on ...
Oregon, University of
public, coeducational institution of higher learning in Eugene, Oregon, U.S. The university comprises colleges of arts and sciences, business, and education; schools of architecture and allied arts, law, music, and ...
Oregonian, The
morning daily newspaper published in Portland, Oregon, one of the leading dailies of the U.S. Northwest and for many years during the 19th century the only newspaper in the seven ...
Oreiller, Henri
French skier and auto racer who won a double championship in the downhill and combined events of Alpine skiing during the 1948 Winter Olympics in St. Moritz, Switzerland. His downhill ... [1 Related Articles]
Oreithyia
(from the article "Boreas") in Greek mythology, the personification of the north wind. He carried off the beautiful Oreithyia, a daughter of Erechtheus, king of Athens; they lived in Thrace as king and queen ...
Orekhovo-Zuyevo
city in Moscow oblast (province), western Russia, east of Moscow city, along the Klyazma River. Formed in 1917 through the amalgamation of several industrial villages, Orekhovo-Zuyevo is now one of ...
Orellana, Francisco de
Spanish soldier and first European explorer of the Amazon River. [4 Related Articles]
Orelli, Giorgio
(from the article "Italian literature") ...of a 1954 anthology of postwar verse edited by Pietro Chiara and Luciano Erba-include Erba himself and the poet and filmmaker Nelo Risi, both of them Milanese, as well as ...
Orem
city, Utah county, north-central Utah, U.S., 4 miles (6.5 km) north of Provo. The Provo River flows to the east in Provo River canyon (containing the scenic Bridal Veil Falls), ...
Orenburg
oblast (province), western Russia, occupying an area that extends across the southern end of the Ural Mountains. It stretches from the limestone plateaus of the Obshchy Syrt in the west, ... [1 Related Articles]
Orenburg
city and administrative centre of Orenburg oblast (province), western Russia, on the Ural River at the Sakmara confluence. Founded as a fortress in 1735 at the Ural-Or confluence, where Orsk ...
orenda
(from the article "mana") Scholars in the 19th and early 20th centuries compared this portrait of mana to other religious phenomena they believed to be parallel, especially wakan and orenda among the Dakota (Sioux) ...
Oreochromis
(from the article "Tilapia") All tilapias were formerly part of the genus Tilapia; however, the group is now divided into mouth-brooding genera (Sarotherodon and Oreochromis) and those that deposit eggs on the bottoms of ...
Oreochromis niloticus
(from the article "Tilapia") ...systems dates back to the early Egyptian civilization. They have since been introduced into freshwater habitats in many warm parts of the world. The most widely cultured and introduced species ...
Oreohelicidae
(from the article "gastropod") ...(Oleaciniidae) and herbivorous (Sagdidae) snails of the Neotropical region.Land snails without (Oreohelicidae and Camaenidae) or with (Bradybaenidae, Helminthoglyptidae, and Helicidae) accessory glands on the genitalia; dominant land snails in ...
Oreopithecus
extinct genus of primates found as fossils in Late Miocene deposits in East Africa and Early Pliocene deposits in southern Europe (11.2 to 3.4 million years ago). Oreopithecus is best ... [2 Related Articles]
Oresme, Nicholas
French Roman Catholic bishop, scholastic philosopher, economist, and mathematician whose work provided some basis for the development of modern mathematics and science and of French prose, particularly its scientific vocabulary. [4 Related Articles]
Oresteia
trilogy of tragic dramas by the ancient Greek dramatist Aeschylus, first performed in 458 BC. It is his last work and the only complete trilogy of Greek dramas that has ... [10 Related Articles]
Orestes
in Greek mythology, son of Agamemnon, king of Mycenae (or Argos), and his wife, Clytemnestra. According to Homer, Orestes was away when his father returned from Troy to meet his ... [1 Related Articles]
Orestes
(from the article "Romulus Augustulus") Romulus was the son of the Western empire's master of soldiers Orestes. His original surname was Augustus, but it was changed to the diminutive because he was still a child ...
Orestias
(from the article "Titicaca, Lake") Lake Titicaca's fish life consists principally of two species of killifish (Orestias)-a small fish, usually striped or barred with black-and a catfish (Trichomycterus). In 1939, and subsequently, trout were introduced ...
Oresund Link
(from the article "Copenhagen") ...of city bus lines. The last streetcars disappeared in 1972. In the late 1990s construction began on a fully automated subway system in Copenhagen, and the first line opened in ...
Orff, Carl
German composer known particularly for his operas and dramatic works and for his innovations in music education. [2 Related Articles]
Orfila, Alejandro
Argentine diplomat who served as secretary-general of the Organization of American States (OAS) from 1975 to 1984.
Orfila, Matthieu
(from the article "toxicology") The study and classification of toxic substances was first systematized by Matthieu Orfila (1787-1853) in the 19th century. Traditionally, the toxicologist's functions have been to identify poisons and to search ...
organ
in biology, a group of tissues in a living organism that have been adapted to perform a specific function. In higher animals, organs are grouped into organ systems; e.g., the ... [12 Related Articles]
organ
in music, a keyboard instrument, operated by the player's hands and feet, in which pressurized air produces notes through a series of pipes organized in scalelike rows. The term organ ... [8 Related Articles]
organ bank
(from the article "transplant") Without a blood supply organs deteriorate rapidly. Cooling can slow down the process but cannot stop it. Organs differ in their susceptibility to damage. At body temperature, irreversible destruction of ...
organ donor
(from the article "United States") Georgia and Wisconsin became the first states to grant a major tax credit to encourage organ donation. Illinois allowed organ transfers from HIV donors to HIV-infected patients. Colorado, Tennessee, and ...
organ of Corti
(from the article "ear, human") ...a right triangle (Figure 5). Its base is formed by the osseous spiral lamina and the basilar membrane, which separate the cochlear duct from the scala tympani. Resting on the ...
Organ of Muskets
(from the article "Springfield") ...(built 1794 and now a national historic site) produced the well-known Springfield muskets; it became a principal manufactory of small arms and later developed the Springfield and Garand rifles. The ...
organ of Ribaga
(from the article "heteropteran") ...female has an organ separate from the reproductive tract to receive the spermatozoa. This organ is a rounded internal pouch associated with a slit on the underside of the abdomen ...
organ pipe
(from the article "keyboard instrument") The proper placement of an organ is acoustically crucial, and for most organ music a resonant room with three seconds or more of reverberation time is desirable. Organs having pipes ...
Organ Pipe Cactus National Monument
desert area in southwestern Arizona, U.S., at the Mexican border 12 miles (19 km) south of Ajo. Established in 1937 with an area of 517 square miles (1,339 square km), ... [1 Related Articles]
organ-pipe cactus
(species Pachycereus thurberi), plant belonging to the family Cactaceae, native to southern Arizona in the United States. Related species occur from Mexico to Venezuela and Peru and the West Indies. ... [1 Related Articles]
organ-pipe coral
(genus Tubipora), any of a genus of marine animals of the class Anthozoa (phylum Cnidaria). The single known species, Tubipora musica, occurs on reefs in shallow waters of the Indian ...
organ-specific autoimmune disease
(from the article "autoimmunity") Autoimmune diseases are divided into two classes: organ-specific and systemic. An organ-specific disease is one in which an immune response is directed toward antigens in a single organ. Examples are ...
organic acidemia
(from the article "metabolic disease") Organic acids are carbon-based compounds that appear at abnormally elevated levels when metabolic pathways involving specific enzymes are blocked. Organic acidemias are conditions characterized by the accumulation of organic acids ...
Organic Act of Guam
(from the article "Guam") Guam is an unincorporated territory of the United States governed under the Organic Act of Guam, passed by the U.S. Congress and approved by the president on Aug. 1, 1950. ...
Organic Act of the Virgin Islands
(from the article "Virgin Islands of the United States") The government is organized under the Organic Act of the Virgin Islands, passed by the U.S. Congress in 1936, amended in 1954 and subsequently. The governor, elected by universal suffrage ...
organic architecture
(from the article "Western architecture") Wright's autobiography (1943) recorded his frustrations in gaining acceptance for organic architecture. The first edition summarized the chief features of that architecture: the reduction to a minimum in the number ...
organic chemical preservative
(from the article "food preservation") Sodium benzoate and other benzoates are among the principal chemical preservatives. The use of benzoates in certain products in prescribed quantity (usually not exceeding 0.1 percent) is permitted in most ...
organic compound
(from the article "organic compound") any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen. ...
organic electrode reaction
(from the article "electrochemical reaction") A very large number of electrochemical reactions involving organic molecules are known. An example is the oxidation of ethylene according to the equation:
organic farming
system of crop cultivation employing biological methods of fertilization and pest control as substitutes for chemical fertilizers and pesticides; the latter products are regarded by proponents of organic methods as ...
organic form
the structure of a work that has grown naturally from the author's subject and materials as opposed to that of a work shaped by and conforming to artificial rules. The ...
organic geochemistry
(from the article "geology") The behaviour of biological materials and their subsequent disposition are important aspects of geochemistry, generally termed organic geochemistry and biogeochemistry. Major problems of organic geochemistry include the question of the ...
Organic Law
(from the article "Egypt") ...was not wholly conservative; his attempts to limit the power and influence of 'Abbas served the interests of the moderate Egyptians who did not belong to the National Party. The ...
Organic Law
(from the article "Spain") ...the regime were increasingly troubled by its lack of "institutionalization" and the problem of the succession, as Franco was in failing health and there was no designated successor. The Organic ...
Organic Law
(from the article "Iraq") ...committee tried to give extensive powers to the king. Discussion on the draft constitution by the Constituent Assembly lasted a month, and after minor modifications it was adopted in July ...
organic ornament
(from the article "architecture") By the early 20th century a preoccupation with the proper function of architectural ornament was characteristic of all advanced architectural thinkers; by the mid-20th century a concept of architectural ornament ...
organic phosphorus compound
(from the article "Agricultural chemicals") The organophosphates are now the largest and most versatile class of insecticides. Two widely used compounds in this class are parathion and malathion; others are Diazinon, naled, methyl parathion, and ...
organic pigment
(from the article "pigment") ...not as solutions but as finely ground solid particles mixed with a liquid. In general, the same pigments are employed in oil- and water-based paints, printing inks, and plastics. Pigments ...
organic pollutant
(from the article "The Environment") The three-month countdown to the implementation of the Stockholm Convention on Persistent Organic Pollutants began on February 17 when France became the 50th country to have ratified the agreement, and ...
organic psychosis
(from the article "psychosis") Psychoses may be divided into two categories-organic and functional. Organic psychoses are those caused by a known physical abnormality, which in most cases is some organic disease of the brain. ...
organic scintillator
(from the article "radiation measurement") ...and the best timing performance is generally obtained from detectors in which the charges are collected most rapidly. For example, timing precision of less than one nanosecond can be obtained ...
organic sedimentary structure
(from the article "sedimentary rock") ...like concretions, vein fillings, and stylolites form well after deposition and penecontemporaneous modification; these are known as secondary structures. Finally, others like stromatolites and organic burrows and tracks, though they ...
organic soil
(from the article "agricultural technology") The solid content of soils is broadly classified as organic and inorganic. Materials of organic origin range from fresh plant tissue to the more or less stable black or brown ...
organic solvent
(from the article "surface coating") ...coatings are prepared and applied in liquid form, the solvents or carrier liquids are among the most important raw materials used in the coatings. In coatings classified as solvent-based, organic ...
organic unity
in literature, a structural principle, first discussed by Plato (in Phaedrus, Gorgias, and The Republic) and later described and defined by Aristotle. The principle calls for internally consistent thematic and ... [2 Related Articles]
organic waste
(from the article "agricultural technology") Organic wastes emanating from municipal sewage, garbage, food-processing industries, pulp mills, and animal enterprises are attacked by aerobic bacteria. When this occurs in water, the oxygen content of the water ...
organicism
(from the article "nature, philosophy of") ...Some philosophers tried to find a way of preserving the autonomy of the biological sciences without resort to special forces or entities. Such theories, referred to as "holism" or "organicism," ...
organismic biology
(from the article "biology") ...and function in a living organism, may be said to have begun in the 17th century, with the invention of the compound microscope. Before that, the individual organism was studied ...
organismic selection
(from the article "nature, philosophy of") ...Genic selection therefore amounts to a kind of counting, or ledger keeping, insofar as it results in a record of the relative successes and failures of different kinds of genes. ...
organismic unity
(from the article "metaphysics") ...and common sense parading as realism (e.g., that things exist separately within their own surfaces) must be revealed for what they are, namely, abstractions. The basic units of reality are ...
organistrum
(from the article "keyboard instrument") ...early Middle Ages generally had sliders that were pulled out to sound different notes; some may have had keys that turned like the key for a lock. Keys of the ...
organization
(from the article "industrial relations") the behaviour of workers in organizations in which they earn their living.
organization development
(from the article "public administration") By the late 1930s the human relations approach had developed into a concept known as "organization development." Its primary goal was to change the attitudes, values, and structures of organizations ...
Organization of Pan Asian American Women
oldest public-policy organization devoted to concerns of Asian Pacific-American women, founded in 1976 to increase participation of Asian women in policy-making and leadership roles. It also serves as a national ...
organization theory
(from the article "social psychology") Such organizations as businesses and armies have been studied by social surveys, statistical field studies, field experiments, and laboratory experiments on replicas of their social hierarchies and communication networks. Although ...
organizational analysis
in management science, the study of the processes that characterize all kinds of organizations, including business firms, government agencies, labour unions, and voluntary associations such as sports clubs, charities, and ...
Organizational Bureau
(from the article "Union of Soviet Socialist Republics") ...with the nonrevolutionary Socialist International. The party was directed by a Central Committee. To streamline work, from March 1919 onward its management was entrusted to the Secretariat, the Organizational Bureau ...
organizational ecology
(from the article "organizational analysis") The second major environmentalist school, organizational ecology, builds on parallels with bioecology and evolution-especially in its application of notions such as selection and adaptation to organizational change. This approach follows ...
organized crime
complex of highly centralized enterprises set up for the purpose of engaging in illegal activities. Such organizations engage in offenses such as cargo theft, fraud, robbery, kidnapping for ransom, and ... [13 Related Articles]
organized labour
association and activities of workers in a trade or industry for the purpose of obtaining or assuring improvements in working conditions through their collective action. [104 Related Articles]
organized resistance movement
(from the article "war, law of") ...during and after World War II they became a common feature of armed conflicts, especially those occurring in the developing world. The third Geneva Convention of 1949 required what is ...