Encyclopædia Britannica Australia -

Encyclopedias since 1768

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Ohio State University ... Okazaki

Ohio State University: state university system consisting of a main campus in Columbus and branches in Lima, Mansfield, Marion, Newark, and the Agricultural Technical Institute in Wooster. The institute and the branches in Lima, Mansfield, and Newark are primarily two-year colleges. The main ...
Ohio University: public, coeducational institution of higher learning in Athens, Ohio, U.S. The university also operates branches in Chillicothe, Ironton, Lancaster, St. Clairsville, and Zanesville. The main campus includes colleges of arts and sciences, business, engineering, education, osteopathic medicine, and communication. The ...
Ohira Masayoshi: prime minister of Japan from 1978 to 1980.
Ohlin, Bertil: Swedish economist and political leader who is known as the founder of the modern theory of the dynamics of trade. In 1977 he shared the Nobel Prize for Economics with James Meade.
ohm: abbreviation Omega, unit of electrical resistance in the metre-kilogram-second system, named in honour of the 19th-century German physicist Georg Simon Ohm. It is equal to the resistance of a circuit in which a potential difference of one volt produces a ...
Ohm's law: in electricity, experimentally discovered relationship that the amount of steady current through a large number of materials is directly proportional to the potential difference, or voltage, across the materials. Thus, if the voltage V (in units of volts) between two ...
Ohm, Georg Simon: German physicist who discovered the law, named after him, which states that the current flow through a conductor is directly proportional to the potential difference (voltage) and inversely proportional to the resistance.
ohmmeter: instrument for measuring electrical resistance, which is expressed in ohms. In the simplest ohmmeters, the resistance to be measured may be connected to the instrument in parallel or in series. If in parallel (parallel ohmmeter), the instrument will draw more ...
Ohno Taiichi: Japanese production-control expert for the Toyota Motor Co. whose just-in-time system (kanban) revolutionized manufacturing methods.
Ohre River: tributary of the Elbe River, rising in the Fichtel Mountains (Fichtelgebirge) of Germany and flowing generally east and northeastward into the Czech Republic past Cheb, Karlovy Vary, Zatec, and Louny until it reaches the Elbe (Labe) River opposite Litomerice. The ...
Ohrid: town, Macedonia, on the northeastern shore of Lake Ohrid (Ohridsko Jezero). The chief resort of Macedonia, Ohrid is linked by rail, road, and air to Skopje. Agriculture, fishing, and tourism provide a livelihood for the population.
Ohrid, Lake: lake on the Macedonia-Albania border, southeastern Europe. It has an area of 134 square miles (347 square km). At 938 feet (286 m), it is the deepest lake in the Balkans. It is connected by underground channels to Lake Prespa ...
oidium: in fungi (division Mycota), a single-celled asexual spore (arthrospore) produced by fragmentation of fungal filaments (hyphae) in lower fungi; the asexual stage of Erysiphaceae (powdery mildew fungi); or, in Basidiomycetes, both an asexual spore (microconidium) and a male cell (spermatium).
oil: any greasy substance that is liquid at room temperature and insoluble in water. It may be fixed, or nonvolatile, oil; essential oil (q.v.); or mineral oil (see petroleum).
oil burner: heating device in which fuel oil is mixed with air under controlled conditions. In most burners oil is supplied under pressure to an atomizing nozzle to produce a fine spray, to which air is added by a motor-driven fan. As ...
oil cake: coarse residue obtained after oil is removed from various oilseeds, rich in protein and minerals and valuable as poultry and other animal feed. It may be broken up and sold or be ground into oil meal. Oil cakes from certain ...
Oil City: city, Venango county, northwestern Pennsylvania, U.S., on a bend of the Allegheny River at the mouth of Oil Creek, 70 miles (113 km) north of Pittsburgh. Founded in 1860 on the site of a Seneca Indian village, it burgeoned as ...
oil extraction: isolation of oil from animal by-products, fleshy fruits such as the olive and palm, and oilseeds such as cottonseed, sesame seed, soybeans, and peanuts. Oil is extracted by three general methods: rendering, used with animal products and oleaginous fruits; mechanical ...
oil gland: any of a variety of skin structures that secrete oily or greasy substances of various functions. In birds, the preen gland, or uropygial gland, located on the back at the base of the tail, supplies oil that is spread upon ...
oil grass: any of the 40 species of the genus Cymbopogon (family Poaceae), aromatic, oilcontaining grasses cultivated in the tropics of Asia and Africa and introduced into tropical America. Most species are densely tufted, with long, narrow, flexible leaves.
oil painting: painting in oil colours, a medium consisting of pigments suspended in drying oils. The outstanding facility with which fusion of tones or colour is achieved makes it unique among fluid painting mediums; at the same time, satisfactory linear treatment and ...
oil palm: African tree cultivated as a source of oil in West and Central Africa, where it originated, and in Malaysia and Indonesia, and as an ornamental tree in many subtropical areas; or, the American oil palm, Corozo oleifera, originating in Central ...
oil plant: any of the numerous plants, either under cultivation or growing wild, used as sources of oil. Oil plants include trees such as palm, herbaceous plants such as flax, and even fungi (Fusarium).
Oil Rivers: area comprising the delta of the Niger River in modern Nigeria, West Africa. The Oil Rivers Protectorate was established by the British in 1885. It was renamed the Niger Coast Protectorate in 1893 and in 1900 was joined to the ...
oil shale: any sedimentary rock containing various amounts of solid organic material that yields hydrocarbons, along with a variety of solid products, when subjected to pyrolysis-a treatment that consists of heating the rock to about 500° C. The liquid oil extracted from ...
oil spill: leakage of petroleum onto the surface of a large body of water. Oceanic oil spills became a major environmental problem in the 1960s, chiefly as a result of intensified petroleum exploration on the continental shelf and the use of supertankers ...
oilbird: (Steatornis caripensis), nocturnal bird of South America that lives in caves and feeds on fruit, mainly the nuts of oil palms. The oilbird is an aberrant member of the order Caprimulgiformes; it comprises the family Steatornithidae. About 30 centimetres (12 ...
oinochoe: wine jug from the classical period of Greek pottery. A graceful vessel with delicately curved handle and trefoil-shaped mouth, the oinochoe was revived during the Renaissance and again during the Neoclassical period of the 18th century.
Oise River: river, rising in Belgium in the Ardennes mountains southeast of Chimay. It enters France northeast of Hirson, 9 miles (15 km) from its source, and flows generally southwestward, watering the Paris Basin, to join the Seine River at Conflans, after ...
Oistrakh, David: world-renowned Soviet violin virtuoso acclaimed for his exceptional technique and tone production.
Oistrakh, Igor: Russian violinist, noted for his lean, modernist interpretations.
Oita: ken (prefecture), northeastern Kyushu, Japan, facing the Suo Sea and Bungo Strait of the Pacific Ocean. Its interior is dominated by a complex mountain system, and most human activity centres on small coastal plains. The long, irregular coastline is marked ...
Ojai: city, Ventura county, southern California, U.S. Situated 12 miles (19 km) north of Ventura and about 85 miles (135 km) northwest of Los Angeles, it lies in the Ojai Valley flanked by mountains.
Ojibwa: Algonquian-speaking Indians who formerly lived along the northern shore of Lake Huron and both shores of Lake Superior from what is now Minnesota to the Turtle Mountains of North Dakota. In Canada those Ojibwa who lived west of Lake Winnipeg ...
Ojin: semilegendary 15th emperor of Japan, who according to tradition flourished in the 3rd-4th century. Ojin is believed to have consolidated imperial power, spearheaded land reform, and actively promoted cultural exchanges with Korea and China. It is said that highly skilled ...
Ojukwu, Odumegwu: Nigerian military leader and politician, who was head of the secessionist state of Biafra during the Nigerian civil war.
Oka River: river in western Russia. It is the largest right-bank tributary of the Volga. Rising in the Central Russian Upland, it flows 932 miles (1,500 km), first north in a rather narrow, winding valley to Kaluga, then sharply eastward across a ...
Oka-Akoko: town, Ondo state, southwestern Nigeria, in the Yoruba Hills, on roads from Owo and Ikare. An agricultural market centre (yams, cassava, corn [maize], rice, palm oil and kernels, okra, and pumpkins) for the local Yoruba people, it is also a ...
Okada Beisanjin: Japanese painter who worked in the bunjin-ga, or literati, style that originated in China and appealed to intellectuals.
Okada Keisuke: Japanese admiral and prime minister who attempted to moderate extremist military influence in the government.
Okakura Kakuzo: art critic who had great influence upon modern Japanese art.
Okamoto Kido: Japanese dramatist and drama critic who wrote nearly 200 historical Kabuki dramas.
okapi: (species Okapia johnstoni), cud-chewing hoofed mammal that is placed along with the giraffe (q.v.) in the family Giraffidae (order Artiodactyla). Found in the rainforests of the Congo region, the okapi was unknown to science until about 1900. Its neck and ...
Okara: city, Punjab province, east-central Pakistan. In 1869 it became the headquarters of the tahsil (subdivision) of Okara, supplanting Gugera as headquarters. A flourishing industrial and commercial trade centre, Okara is situated on the Sahiwal-Lahore road and railway 24 miles (39 ...
Okara, Gabriel: Nigerian poet and novelist whose verse had been translated into several languages by the early 1960s.
Okavango River: fourth longest river system in southern Africa, running basically southeastward for 1,000 miles (1,600 km) from central Angola, where it is known as the Kubango, to the Kalahari (desert) in northern Botswana, where the river terminates in an immense inland ...
Okawa: city, Fukuoka ken (prefecture), Kyushu, Japan, on the mouth of the Chikugo-gawa (Chikugo River). It was a fishing port known as Wakatsu during the Tokugawa era (1603-1867), when it also served as a market for agricultural produce ...
Okawa Shumei: ultranationalistic Japanese political theorist whose writings inspired many of the right-wing extremist groups that dominated Japanese politics during the 1930s. Okawa personally organized and participated in many of the major rightist attempts at direct action, and during World War II ...
Okaya: city, central Nagano ken (prefecture), east-central Honshu, Japan, on the western shore of Lake Suwa. Okaya was a small village until the establishment of its first large silk-reeling factory in 1875. After World War II many of ...
Okayama: city and prefecture (ken), western Honshu, Japan, bordering the Inland Sea, includes numerous offshore islands. Okayama prefecture has a predominantly agricultural economy. Rice, grapes, peaches, igusa (rushes for tatami mats), cotton, and other cash ...
Okazaki: city, south-central Aichi ken (prefecture), central Honshu, Japan. It is located in the Mikawa Plain, on the Yahagi River, about 20 miles (32 km) southeast of Nagoya. It developed around Okazaki Castle after its construction in 1455. ...