Oh Eun-Sun is a South Korean professional mountain climber whose claim to be the first woman to scale all 14 of the ‘eight-thousanders’—the world’s tallest peaks, over 26,250 feet (8,000 metres) high—was disputed as some questioned whether she had summited Kanchenjunga. Oh’s father was in the South

hydroxyl group (―OH), in chemistry, a functional group with one hydrogen and one oxygen atom. An oxygen atom normally forms two σ bonds with other atoms; the water molecule, H2O, is the simplest and most common example. If one hydrogen atom is removed from a water molecule, a hydroxyl functional

Carlos Germán Belli: In such books as ¡Oh hada cibernética! (1961; “O Cybernetic Fairy”), Belli creates a number of pseudoclassical figures to whom he addresses his complaints: these include Fisco, the god of income; and the Hada Cibernética (“The Cybernetic Fairy”), a sort of fairy godmother who represents technological advances that would…

Devendra Banhart: …Banhart to wide attention was Oh Me Oh My… (2002), an extension of the distinctly personal lo-fi recordings he first made on four-track tape recorders. His flexible approach to songwriting, coupled with his penchant for the unusual or surreal, won favour from critics. As his popularity grew, Banhart’s albums—including Niño…

Bob Dylan: Elder statesman of folk and rock: …again returned to form with Oh Mercy, produced by Daniel Lanois. When Life magazine published a list of the 100 most influential Americans of the 20th century in 1990, Dylan was included, and in 1991 he received a lifetime achievement award from the Recording Academy. In 1992 Columbia Records celebrated…

Oh Eun-Sun is a South Korean professional mountain climber whose claim to be the first woman to scale all 14 of the ‘eight-thousanders’—the world’s tallest peaks, over 26,250 feet (8,000 metres) high—was disputed as some questioned whether she had summited Kanchenjunga. Oh’s father was in the South

Elizabeth Strout: Lucy Barton novels: …to the Amgash series with Oh William! (2021), which is set several decades after My Name Is Lucy Barton. While grieving the death of her second husband, Lucy tries to help her first husband through a series of crises and continues to struggle with the scars of her childhood.

citizen journalism: …Korea, where the online entrepreneur Oh Yeon-ho declared in 2000 that “every citizen is a reporter.” Oh and three South Korean colleagues started an online daily newspaper in 2000 because, he said, they were dissatisfied with the traditional South Korean press. Unable to afford the costs of hiring professionals and…

Squid Game: Reception and awards: Oh Yeong-Su won a Golden Globe Award for best performance by an actor in a supporting role on television for his portrayal of the mysterious Oh Il-Nam, and Lee was nominated for outstanding performance by a male actor in a drama series. Jung Ho-Yeon (who…

Stephen Foster: …he sold his song “Oh! Susanna” for $100; together with his “Old Uncle Ned” it brought the publisher about $10,000. In 1849 Foster entered into a contract with Firth, Pond & Co., the New York publishers to whom he had previously given the rights for “Nelly Was a Lady.”…

Joan Littlewood: Oh! What a Lovely War (1963), an original evocation and criticism of World War I using popular songs of the period, projected newspaper headlines, and other devices to emphasize its message, became perhaps her most famous production. Other outstanding plays, full of vitality, noisy, and…

Richard Quine: …the famed drug-rehabilitation centre, but Oh Dad, Poor Dad, Mama’s Hung You in the Closet and I’m Feelin’ So Sad (1967), with Rosalind Russell and Robert Morse, was a tart adaptation of Arthur Kopit’s dark Broadway comedy. Quine helmed the star-studded Hotel (1967), which was based on Arthur Hailey’s best…

Carl Reiner: Film directing: …returning to Hollywood to make Oh, God! (1977), a surprise blockbuster. It starred John Denver as a supermarket assistant manager who is summoned to be the messenger of God (played by George Burns in a highly praised performance). The charming comedy spawned several sequels, though Reiner was not involved with…

Tony Randall: Onstage he appeared in Oh, Men! Oh, Women! (1954), and in 1957 he began his Hollywood career with the film version of that play. Roles in three Rock Hudson–Doris Day films—Pillow Talk (1959), Lover Come Back (1961), and Send Me No Flowers (1964)—solidified both his

Roddy Doyle: Other works: …further adventures are detailed in Oh, Play That Thing (2004), which follows him as he journeys through the United States, and The Dead Republic (2010), which chronicles his return to Ireland. In Smile (2017) a lonely middle-aged man looks back on his life, especially his troubled childhood. Doyle’s next novel,…

Roy Orbison: …“It’s Over” (1964), and “Oh, Pretty Woman” (1964) were all hits, and Orbison was one of the few American rockers to maintain a place high on the pop charts during the British Invasion. After a series of personal tragedies and professional setbacks that derailed his career in the mid-1960s,…

Sadaharu Oh is a professional baseball player who played for the Tokyo Yomiuri Giants in the Japanese Central League for 22 seasons between 1959 and 1980 and who holds the record for the most home runs ever hit (868). (See also Japanese baseball leagues). He is among the most revered of Japan’s

Sandra Oh is a Canadian American actress who helped break barriers for Asian women in the entertainment industry and who is especially known for portraying strong female characters, notably on the television shows Grey’s Anatomy and Killing Eve. Oh’s parents were immigrants from South Korea. Her

Sandra Oh is a Canadian American actress who helped break barriers for Asian women in the entertainment industry and who is especially known for portraying strong female characters, notably on the television shows Grey’s Anatomy and Killing Eve. Oh’s parents were immigrants from South Korea. Her

Hans Joachim Pabst von Ohain was a German designer of the first operational jet engine. After obtaining his doctorate at the University of Göttingen, he became a junior assistant to Hugo von Pohl, director of the Physical Institute there. When the German aircraft builder Ernst Heinkel asked the

Uno Chiyo: …her finest work, the novella Ohan (1957; Eng. trans. as Ohan in The Old Woman, the Wife, and the Archer). Published 10 years after she had begun writing it, Ohan tells the story of a man who, after leaving his wife to live with a geisha, wants to return to…

Ohara, Japanese school of floral art, founded by Ohara Unshin in the early 20th century, which introduced the moribana style of naturalistic landscapes in shallow, dishlike vases. The moribana style, while retaining a basic triangular structure in its floral arrangements, is in the nageire (fresh

Kurashiki: …cultural centre that houses the Ōhara Museum of Art. Pop. (2010) 475,513; (2015) 477,118.

Kurashiki: …cultural centre that houses the Ōhara Museum of Art. Pop. (2010) 475,513; (2015) 477,118.

moribana: Developed by Ohara Unshin, founder of the Ohara school of floral art, moribana breaks with the rigid structural rules of classical floral art; it sometimes incorporates flowers imported from Western countries and uses the basic triangular principle of floral art in a three-dimensional (foreground, middle ground, and…

ocean warming: …of water (which is called ocean heat content, OHC). OHC can be calculated by measuring using floating sensors on buoys (or Argo floats) and ships or from probes dropped from aircraft to measure sea surface temperatures (SST) or by using satellite-borne sensors to measure the thermal expansion of large parcels…

Office of the United Nations High Commissioner for Human Rights (OHCHR), department of the United Nations (UN) created to aid and protect human rights. The UN General Assembly Resolution 48/141 created the OHCHR in its present form in 1993. The OHCHR works with all levels of government

Michael Lewis: From page to screen: Moneyball, The Blind Side, and The Big Short: …interwoven with the story of Michael Oher, then one of the hottest prospects in high-school football. Lewis had a personal connection with Oher: his adoptive parents were Lewis’s childhood friend Sean Tuohy and his wife, Leigh Anne Tuohy. The book was also adapted into a film, a commercial and critical…

crucible process: After 1870 the Siemens regenerative gas furnace replaced the coke-fire furnace; it produced even higher temperatures. The Siemens furnace had a number of combustion holes, each holding several crucibles, and heated as many as 100 crucibles at a time. All high-quality tool steel and high-speed steel was long…

Neil Young: Early career: Buffalo Springfield and Crosby, Stills, Nash and Young: …Young penned and sang “Ohio,” an anthem that rallied campus activists after National Guardsmen killed four antiwar demonstrators at Kent State University, Kent, Ohio, in May 1970.

Ohio, constituent state of the United States of America, on the northeastern edge of the Midwest region. Lake Erie lies on the north, Pennsylvania on the east, West Virginia and Kentucky on the southeast and south, Indiana on the west, and Michigan on the northwest. Ohio ranks 34th in terms of

submarine: Strategic submarines: Navy commissioned 18 Ohio-class submarines between 1981 and 1997 (see photograph)—though some of them have since been converted to non-SLBM use under the terms of arms control treaties. These vessels displace 16,600 tons at the surface and are about as long as the Soviet/Russian Typhoons.

The Ohio State University, state university system of Ohio, U.S., 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 Mansfield and Newark are primarily two-year colleges. The

Akron: …by the completion of the Ohio and Erie Canal in 1827 and of the Pennsylvania and Ohio Canal in 1840, linking it with Pittsburgh. Waterpower and transportation supplied by these canals led to Akron’s early development as an industrial centre. The abundant water supply and the arrival of the railroads…

buckeye: Species: The most-notable species is the Ohio buckeye (A. glabra), also called fetid, or Texas, buckeye, which is primarily found in the Midwestern region of the United States. The tree grows up to 21 metres (70 feet) in height and has twigs and leaves that yield an unpleasant odour when crushed.…

Ohio Company, in U.S. colonial history, organization of Englishmen and Virginians, established in 1748, to promote trade with groups of American Indians and to secure English control of the Ohio River valley. Its activities in an area also claimed by France led to the outbreak of the last French

Manasseh Cutler: …in 1786 to form the Ohio Company of Associates in order to develop the Ohio Valley. The veterans hoped to use their depreciated Continental certificates at par value for the purchase of a large tract of land.

American frontier: Early roads: In the Ohio Enabling Act of 1802, a fund from the sale of public lands was set aside for road construction. In 1811 the federal government began work on a section of hard-surfaced (macadamized) road reaching from Cumberland, Maryland, to Wheeling, Virginia (now West Virginia) on the…

Ohio Gang, in U.S. history, a group of politicians who achieved high office during the presidential administration of Warren G. Harding and who betrayed their public trust through a number of scandals. Leader of the Ohio Gang was Harry M. Daugherty, a long-time political operative who was the

Ohio Idea, in U.S. history, proposal first presented in the Cincinnati Enquirer in 1867 and later sponsored by Senator George H. Pendleton of Ohio to redeem American Civil War bonds in paper money instead of gold. The Ohio Idea was part of the struggle between hard-money (specie) and soft-money

Manasseh Cutler: …in 1786 to form the Ohio Company of Associates in order to develop the Ohio Valley. The veterans hoped to use their depreciated Continental certificates at par value for the purchase of a large tract of land.

mechanics’ institute: In Cincinnati the Ohio Mechanics’ Institute opened in 1829. In France, Baron Charles Dupin founded several institutes before 1826, beginning at La Rochelle and Nevers.

Marathon Oil Company was a major American petroleum company of the 20th century with a full range of operations, from exploration and production to refining, marketing, and transportation. Its descendant companies were Marathon Petroleum Corporation, headquartered in Findlay, Ohio, engaged in the

the Ohio Players, American funk and pop band from Dayton, Ohio, that put an indelible stamp on Black music from the urban Midwest in the 1970s. The principal members were Clarence (“Satch”) Satchell (b. April 14, 1940, Cleveland, Ohio, U.S.—d. December 30, 1995, Dayton, Ohio), Leroy (“Sugarfoot”)

Ohio River, major river artery of the east-central United States. Formed by the confluence of the Allegheny and Monongahela rivers at Pittsburgh, it flows northwest out of Pennsylvania, then in a general southwesterly direction to join the Mississippi River at Cairo, Illinois (see photograph),

baseball: Segregation: The Ohio State League also wrestled inconclusively with the color question. It was becoming clear that the color bar was gradually being raised. Black players were in the minor leagues for the next few years, but their numbers declined steadily. The last Black players in the…

Audra McDonald: …included Shuffle Along (2016) and Ohio State Murders (2022). In the latter, written by Adrienne Kennedy, McDonald played a writer dealing with a traumatic past. Both the production and her performance earned particular praise.

The Ohio State University, state university system of Ohio, U.S., 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 Mansfield and Newark are primarily two-year colleges. The

Columbus: The contemporary city: The Ohio Statehouse (a limestone structure in Doric style, completed in 1861) has a monument by sculptor Levi Tucker Scofield.

Ohio University, public, coeducational institution of higher learning in Athens, Ohio, U.S., about 80 miles (130 km) southeast of Columbus. It was the first institution of higher education in the Northwest Territory. The university has branches in Chillicothe, Ironton, Lancaster, St. Clairsville,

Delaware: Ohio Wesleyan University (1842) was built around the town’s Mansion House (now Elliot Hall). The Methodist Theological School in Ohio was opened in Delaware in 1960. Perkins Observatory, maintained by Ohio Wesleyan University, is 4 miles (6 km) south of the city. A stone monument…

U.S. state flag in a swallow-tailed shape incorporating red and white stripes and a blue hoist triangle featuring a white-bordered red disk and 17 stars.Ohio is the only one of the 50 states to use a nonrectangular flag. Its designer, John Eisenmann, may have been inspired by the swallow-tailed

Ōhira Masayoshi was the prime minister of Japan from 1978 to 1980. Ōhira was a converted Christian who rose from rural poverty and worked his way through what is now Hitosubashi University. After graduation (1936), he pursued a career in the Finance Ministry and later (1952) was elected to the

solar cell: Development of solar cells: …the silicon solar cell by Russell Ohl in 1941. Thirteen years later, aided by the rapid commercialization of silicon technology needed to fabricate the transistor, three other American researchers—Gerald Pearson, Daryl Chapin, and Calvin Fuller—demonstrated a silicon solar cell capable of a 6 percent energy-conversion efficiency when used in direct…

Bertil Ohlin was a 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. Ohlin studied at the University of Lund and at Stockholm University under Eli Heckscher. He

Bertil Ohlin was a 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. Ohlin studied at the University of Lund and at Stockholm University under Eli Heckscher. He

ohm, abbreviation Ω, 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 current of one ampere (1Ω = 1 V/A); or, the

Ohm’s law, description of the relationship between current, voltage, and resistance. 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 ends

Ohm’s law, description of the relationship between current, voltage, and resistance. 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 ends

acoustics: Modern advances: …complex tone is known as Ohm’s law of hearing (distinguishing it from the more famous Ohm’s law of electrical resistance).

Georg Ohm was a 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. Ohm became professor of mathematics at the Jesuits’ College

Georg Ohm was a 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. Ohm became professor of mathematics at the Jesuits’ College

golden ratio: …as “golden” by German mathematician Martin Ohm in 1835. The Greeks also had observed that the golden ratio provided the most aesthetically pleasing proportion of sides of a rectangle, a notion that was enhanced during the Renaissance by, for example, the work of the Italian polymath Leonardo da Vinci and…

resistivity: …the unit of resistivity is ohm-metre. If lengths are measured in centimetres, resistivity may be expressed in units of ohm-centimetre.

semiconductor device: Schottky diode: …a contact is called an ohmic contact. All semiconductor devices as well as integrated circuits need ohmic contacts to make connections to other devices in an electronic system.

food preservation: Commercial sterility: …method for heating foods, called ohmic heating, passes a low-frequency electric current of 50 to 60 hertz directly through the food. A liquid food containing solids, such as diced fruit, is pumped through a pipe surrounded by electrodes. The product is heated as long as the electrical conductivity of the…

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 current as resistance

M.I.A.: …released a new song, “OHMNI 202091,” on a subscription-based Web platform.

citizen journalism: …printing a newspaper, they started OhmyNews, a Web site that used volunteers to generate its content. In a speech on the site’s seventh anniversary, Oh, the firm’s president and CEO, noted that the news site began with 727 citizen reporters in one country and by 2007 had grown to 50,000…

Ohno Taiichi was a Japanese production-control expert for the Toyota Motor Co. His just-in-time system (kanban) revolutionized manufacturing methods. After graduating from Nagoya Technical High School (1932) Ohno joined Toyota and, about 20 years later, began implementing his cost-saving program.

Apolo Anton Ohno is an American short-track speed skater who was the most-decorated American athlete in the history of the Winter Olympics. In three Games (2002, 2006, and 2010) he accumulated a total of eight medals—two gold, two silver, and four bronze. Ohno’s Japanese-born father encouraged him

Mississippi: Cultural life: …notable Mississippi museum is the Ohr-O’Keefe Museum of Art in Biloxi, which was designed by Frank Gehry.

Ohře 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, Žatec, and Louny until it reaches the Elbe (Labe) River opposite Litoměřice. The river is 196 miles (316

Ohrid, town, southwestern North Macedonia, on the northeastern shore of Lake Ohrid (Ohridsko Jezero). The chief resort of North Macedonia, Ohrid is linked by road and air to Skopje. Agriculture, fishing, and tourism provide a livelihood for the population. In Classical antiquity Ohrid was a Greek

Lake Ohrid, lake on the North Macedonia–Albania border in southeastern Europe. It has an area of 134 square miles (347 square km). At 938 feet (286 meters), it is the deepest lake in the Balkans. It is connected by underground channels to Lake Prespa to the southeast. Lake Ohrid is known for its

Lake Ohrid, lake on the North Macedonia–Albania border in southeastern Europe. It has an area of 134 square miles (347 square km). At 938 feet (286 meters), it is the deepest lake in the Balkans. It is connected by underground channels to Lake Prespa to the southeast. Lake Ohrid is known for its

Ahura Mazdā, supreme god in ancient Iranian religion, especially Zoroastrianism, the religious system of the Iranian prophet Zarathustra (c. 6th century bce; Greek name Zoroaster). Ahura Mazdā was worshipped by the Persian king Darius I (reigned 522–486 bce) and his successors as the greatest of

auricular style, a 17th-century ornamental style based on parts of the human anatomy. It was invented in the early 17th century by Dutch silversmiths and brothers Paulus and Adam van Vianen. Paulus was inspired by anatomy lectures he attended in Prague, and both he and Adam became known for the

Yoshinori Ohsumi is a Japanese cell biologist known for his work in elucidating the mechanisms of autophagy, a process by which cells degrade and recycle proteins and other cellular components. Ohsumi’s research played a key role in helping to uncover the critical physiological activities of

Shohei Ohtani is a Japanese professional baseball pitcher and designated hitter (DH) who established himself as the sport’s greatest two-way player in a century following his Major League Baseball (MLB) debut in 2018. In 2021 he became the first player in major league history to be named an

osteogenesis imperfecta (OI), rare hereditary disease of connective tissue characterized by brittle bones that fracture easily. OI arises from a genetic defect that causes abnormal or reduced production of the protein collagen, a major component of connective tissue. There are four types of OI,

Oyapock River, river that forms the border between French Guiana and the Brazilian state of Amapá. It rises in the Tumuc-Humac Mountains and flows northeast for 311 miles (500 km) to empty into the Atlantic near Cape Orange. The country through which it passes is thinly populated and is mostly

independent counsel, Official appointed by the court at the request of the U.S. attorney general to investigate and prosecute criminal violations by high government officials, members of Congress, or directors of a presidential election campaign after an investigation by the attorney general finds

Organization of the Islamic Cooperation (OIC), an Islamic organization established in Jeddah, Saudi Arabia, in May 1971, following summits by Muslim heads of state and government in 1969 and by Muslim foreign ministers in 1970. The membership includes Afghanistan, Algeria, Bahrain, Bangladesh,

scoter: The black scoter is the least abundant in the New World. All three species of scoter feed mainly on marine animals such as clams; only about 10 percent of their diet is plant material. The three species may be seen feeding in mixed flocks.

The Tragic Death of the Sons of Usnech, in the Ulster cycle of Irish heroic myths, the love story of the ill-fated Deirdre and Noísi. First composed in the 8th or 9th century, the story was revised and combined in the 15th century with The Tragic Death of the Children of Tuireann (Oidheadh Chloinne

Oedipus Rex, play by Sophocles, performed sometime between 430 and 426 bce, that marks the summit of classical Greek drama’s formal achievement, known for its tight construction, mounting tension, and perfect use of the dramatic devices of recognition and discovery. It examines the story of

oidium, in fungi (kingdom Fungi), 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 Basidiomycota, both an asexual spore (microconidium) and a male cell

audiencia: …in civil cases were called oidores and, for criminal cases, alcaldes de crimen. The presiding officer of the audiencia was called gobernador, or regente. From the reign of Philip II (1556–98), the decisions of audiencias were final, except when the death penalty was decreed or in civil cases when the…

World Organisation for Animal Health (OIE), intergovernmental organization established to gather and disseminate information about animal diseases around the world and to create health standards to protect international trade in animals and their products. It was founded in 1924 as the Office

goose, ancient French board game, said to have been derived from the Greeks, which was popular in Europe at the end of the Middle Ages. Goose was played on a board upon which was drawn a fantastic scroll, called the jardin de l’oie (“goose garden”), divided into 63 spaces marked with certain

metalwork: Gothic: …the work of Nicholas’ follower Hugo d’Oignies, whose reliquary for the rib of St. Peter at Namur (1228) foreshadows the partly crystal reliquaries in which the freestanding relic is exposed to the view of the faithful; it is decorated with Hugo’s particularly fine filigree and enriched by naturalistic cutout leaves…

history of Mesopotamia: The Seleucid period: …were many financial officials (oikonomoi); some of them oversaw royal possessions, and others managed local taxes and other economic matters. The legal system in the Seleucid empire is not well understood, but presumably both local Mesopotamian laws and Greek laws, which had absorbed or replaced old Achaemenian imperial laws,…

history of Mesopotamia: The Seleucid period: …were many financial officials (oikonomoi); some of them oversaw royal possessions, and others managed local taxes and other economic matters. The legal system in the Seleucid empire is not well understood, but presumably both local Mesopotamian laws and Greek laws, which had absorbed or replaced old Achaemenian imperial laws,…

Eastern Orthodoxy: Relations between church and state: …one universal Christian society, the oikoumenē, led jointly by the empire and the church—was still the ideology of the Byzantine emperors. The authority of the patriarch of Constantinople was motivated in a formal fashion by the fact that he was the bishop of the “New Rome,” where the emperor and…

lipid, any of a diverse group of organic compounds including fats, oils, hormones, and certain components of membranes that are grouped together because they do not interact appreciably with water. One type of lipid, the triglycerides, is sequestered as fat in adipose cells, which serve as the

oil, any greasy substance that is liquid at room temperature and insoluble in water. There are many types, such as essential oil; orris oil; mineral oil (see petroleum); whale oil; pine oil; linseed oil; perilla oil; fish oil; tall oil; citronella oil. There is also cooking oil, such as olive,

petroleum, complex mixture of hydrocarbons that occur in Earth in liquid, gaseous, or solid form. A natural resource, petroleum is most often conceived of in its liquid form, commonly called crude oil, but, as a technical term, petroleum also refers to natural gas and the viscous or solid form

blister beetle: …Meloinae are sometimes known as oil beetles. They do not have hindwings as do most blister beetles, nor do their wing covers meet in the middle of the back; rather, the covers are much shorter and overlap. Oil beetles secrete an oily substance that protects them from predators because of…

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 the cone-shaped spray emerges from the nozzle, ignition is