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  • iron law of wages (economics)

    wage and salary: Subsistence theory: Subsistence theories emphasize the supply aspects of the labour market while neglecting the demand aspects. They hold that change in the supply of workers is the basic force that drives real wages to the minimum required for subsistence (that is, for basic needs…

  • Iron Law of Wages (economics)

    David Ricardo: … doctrines were typified in his Iron Law of Wages, which stated that all attempts to improve the real income of workers were futile and that wages perforce remained near the subsistence level.

  • Iron Liege (racehorse)

    Bill Hartack: …and in 1957 he rode Iron Liege to victory at the Kentucky Derby. His four other Kentucky Derby winners were Venetian Way, 1960; Decidedly, 1962; Northern Dancer, 1964; and Majestic Prince, 1969. In 1964, riding Northern Dancer, he won the Preakness for a second time and, in 1969, for a…

  • iron lung (medicine)

    polio: Treatment and vaccination: …have largely replaced the “iron lungs” that gave polio such a dreadful image during the 20th century. Formally known as tank respirators, iron lungs were large steel cylinders that enclosed the abdomen or the entire body (except for the head) of a patient lying immobilized on a bed. Through…

  • Iron Man (fictional character)

    Iron Man, American comic book superhero, a mainstay of Marvel Comics, who first appeared in 1963 in Tales of Suspense no. 39. His creation is officially credited to four people: writer and editor Stan Lee, who plotted the first story; his brother Larry Lieber, who scripted it; artist Don Heck, who

  • Iron Man (film by Favreau [2008])

    Iron Man: From Armor Wars to the silver screen: …and Paramount released the live-action Iron Man in 2008. The film, an enormous commercial and critical success, was directed by Jon Favreau and starred Robert Downey, Jr., who proved adept at capturing Tony Stark’s personality, brilliance, and charisma. Favreau and Downey returned for the sequel Iron Man 2 (2010). Downey…

  • Iron Man (film by Browning [1931])

    Tod Browning: The MGM and Universal years: Iron Man (1931) was based on a W.R. Burnett novel and starred Lew Ayres as a prizefighter and Jean Harlow as his disloyal wife.

  • Iron Man 2 (film by Favreau [2010])

    Iron Man: From Armor Wars to the silver screen: …Downey returned for the sequel Iron Man 2 (2010). Downey became a mainstay of the Marvel Cinematic Universe, reprising his role for The Avengers (2012), Iron Man 3 (2013), Avengers: Age of Ultron (2015), Captain America: Civil War (2016), Spider-Man: Homecoming (2017), Avengers:

  • Iron Man 3 (film by Black [2013])

    Iron Man: From Armor Wars to the silver screen: …role for The Avengers (2012), Iron Man 3 (2013), Avengers: Age of Ultron (2015), Captain America: Civil War (2016), Spider-Man: Homecoming (2017), Avengers: Infinity War (2018), and Avengers: Endgame (2019).

  • iron mask, the man in the (French convict)

    The man in the iron mask, political prisoner, famous in French history and legend, who died in the Bastille in 1703, during the reign of Louis XIV. There is no historical evidence that the mask was made of anything but black velvet (velours), and only afterward did legend convert its material into

  • iron meteorite

    Iron meteorite, any meteorite consisting mainly of iron, usually combined with small amounts of nickel. When such meteorites, often called irons, fall through the atmosphere, they may develop a thin, black crust of iron oxide that quickly weathers to rust. Though iron meteorites constitute only

  • Iron Mike (American boxer)

    Mike Tyson, American boxer who, at age 20, became the youngest heavyweight champion in history. A member of various street gangs at an early age, Tyson was sent to reform school in upstate New York in 1978. At the reform school, social worker and boxing aficionado Bobby Stewart recognized his

  • Iron Mike (American football player and coach)

    Mike Ditka, American gridiron football player and head coach. In the 1960s and early ’70s he proved himself one of professional football’s greatest tight ends, using his talent for catching passes to revolutionize his position. After retiring as a player, Ditka embarked on a successful coaching

  • Iron Mountain (Michigan, United States)

    Iron Mountain, city, seat (1891) of Dickinson county, southwestern Upper Peninsula of Michigan, U.S., about 50 miles (80 km) west of Escanaba. Settled in 1879, it was named for its proximity to a bluff heavily stratified with iron ore. Iron Mountain was incorporated as a village in 1887 and as a

  • Iron Mountain (hill, Florida, United States)

    Lake Wales: …established in 1929 on nearby Iron Mountain (295 feet [90 metres], the highest point in peninsular Florida) by Edward W. Bok, Pulitzer Prize winner (1921) and editor of the Ladies’ Home Journal. The gardens, famed for their plant and animal life, form a peaceful setting for the Bok Singing Tower,…

  • iron oxide (chemical compound)

    sound recording: The audiotape: …particles of magnetic powder, usually ferric oxide (Fe2O3) and to a lesser extent chromium dioxide (CrO2). The recording head of the tape deck consists of a tiny C-shaped magnet with its gap adjacent to the moving tape. The incoming sound wave, having been converted by a microphone into an electrical…

  • iron pressing (textiles)

    clothing and footwear industry: Pressing and molding processes: …major divisions: buck pressing and iron pressing. A buck press is a machine for pressing a garment or section between two contoured and heated pressure surfaces that may have steam and vacuum systems in either or both surfaces. Before 1905 all garment pressing was done by hand irons heated directly…

  • Iron Prince, The (Prussian prince)

    Frederick Charles, prince of Prussia, Prussian field marshal, victor in the Battle of K?niggr?tz (Sadowa) on July 3, 1866. The eldest son of Prince Charles of Prussia and nephew of the future German emperor William I, Frederick Charles was educated from childhood for a military career. He became a

  • iron processing

    Iron processing, use of a smelting process to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of iron and of its preparation for smelting. Iron (Fe) is a relatively dense metal with a silvery white appearance and distinctive

  • iron putty (adhesive)

    putty: …substances resembling putty, such as iron putty, a mixture of ferric oxide and linseed oil; and red-lead putty, a mixture of red and white lead and linseed oil. Certain doughlike plastics are also called putty. Putty powder (tin oxide) is used in polishing glass, granite, and metal.

  • iron pyrite (mineral)

    Pyrite, a naturally occurring iron disulfide mineral. The name comes from the Greek word pyr, “fire,” because pyrite emits sparks when struck by metal. Pyrite is called fool’s gold; to the novice its colour is deceptively similar to that of a gold nugget. Nodules of pyrite have been found in

  • Iron Ring (Austrian political coalition)

    Austria: Political realignment: …itself the name of the Iron Ring. In April 1880, language ordinances were issued that made Czech and German equal languages in the “outer [public] services” in Bohemia and Moravia. In 1882 the University of Prague was divided, giving the Czechs a national university. In the same year, an electoral…

  • iron salt (chemical compound)

    ink: …a mixture of a soluble iron salt with an extract of tannin was used as a writing ink and is the basis of modern blue-black inks. The modern inks usually contain ferrous sulfate as the iron salt with a small amount of mineral organic acid. The resulting solution is light…

  • iron storage disease (pathology)

    Hemochromatosis, inborn metabolic defect characterized by an increased absorption of iron, which accumulates in body tissues. The clinical manifestations include skin pigmentation, diabetes mellitus, enlargement of the spleen and liver, cirrhosis, heart failure, arthritis, and general weakness and

  • iron sulfide (chemical compound)

    mineral deposit: Immiscible melts: Iron sulfide is the principal constituent of most immiscible magmas, and the metals scavenged by iron sulfide liquid are copper, nickel, and the platinum group. Immiscible sulfide drops can become segregated and form immiscible magma layers in a magma chamber in the same way that…

  • iron tourmaline (rock)

    greisen: Greisen is closely connected with schorl, both in its mineralogical composition and in its mode of origin. Schorl is a pneumatolytic product consisting of quartz, tourmaline, and, often, white mica and thus passes into greisen. Both of these rocks frequently contain small percentages of cassiterite (tin oxide) and may be…

  • iron(II) chloride (chemical compound)

    chemical compound: Binary ionic compounds: …contains Fe2+, is designated as iron(II) chloride. In each case, the Roman numeral in the name specifies the charge of the metal ion present.

  • iron(III) chloride (chemical compound)

    chemical compound: Binary ionic compounds: …which contains Fe3+, is named iron(III) chloride. On the other hand, the compound FeCl2, which contains Fe2+, is designated as iron(II) chloride. In each case, the Roman numeral in the name specifies the charge of the metal ion present.

  • Iron, Ralph (South African writer)

    Olive Schreiner, writer who produced the first great South African novel, The Story of an African Farm (1883). She had a powerful intellect, militantly feminist and liberal views on politics and society, and great vitality that was somewhat impaired by asthma and severe depressions. Her brother

  • iron-boron (alloy)

    amorphous solid: Magnetic glasses: 2 iron-boron and Fe0.8B0.1Si0.1 iron-boron-silicon. They are readily formed as long metallic glass ribbons by melt spinning or as wide sheets by planar flow casting. Ferromagnetic glasses are mechanically hard materials, but they are magnetically soft, meaning that they are easily magnetized by small magnetic fields.…

  • iron-boron-silicon (alloy)

    amorphous solid: Magnetic glasses: 1 iron-boron-silicon. They are readily formed as long metallic glass ribbons by melt spinning or as wide sheets by planar flow casting. Ferromagnetic glasses are mechanically hard materials, but they are magnetically soft, meaning that they are easily magnetized by small magnetic fields. Also, because of…

  • Iron-Bridge (bridge, England, United Kingdom)

    Ironbridge, structure that is generally considered the first cast-iron bridge, spanning the River Severn at Ironbridge, near Coalbrookdale, in Shropshire, England. It is now a British national monument. The bridge’s semicircular arch spans 100.5 feet (30.6 m) and has five arch ribs, each cast in t

  • iron-core transformer (electronics)

    transformer: Iron-core transformers serve analogous functions in the audio-frequency range.

  • iron-counterweight system (hoist)

    stagecraft: Flying systems: …rope-set, or hemp, systems and counterweight systems. The rope-set system normally has three or more ropes attached to a metal pipe, called a batten, above the stage. The ropes pass over loft blocks on the grid above the stage. Then, at the side of the stage house, they pass over…

  • iron-deficiency anemia

    Iron deficiency anemia, anemia that develops due to a lack of the mineral iron, the main function of which is in the formation of hemoglobin, the blood pigment that carries oxygen from the blood to the tissues. Iron deficiency anemia, the most common anemia, occurs when the body’s loss of iron is

  • iron-group metal (mineral)

    mineral: Metals: The iron-group metals are isometric and have a simple cubic packed structure. Its members include pure iron, which is rarely found on the surface of Earth, and two species of nickel-iron (kamacite and taenite), which have been identified as common constituents of meteorites. Native iron has…

  • iron-hulled barge (boat)

    John Wilkinson: …Wilkinson innovation (1787) was an iron-hulled barge—a sensation at the time—to transport the heavy ordnance he was manufacturing for the government. Wilkinson taught the French how to bore cannon from solid castings; and he cast all the tubes, cylinders, and ironwork required for the Paris waterworks. Fittingly, he was buried…

  • iron-magnesium-manganese amphibole group (mineralogy)

    amphibole: Chemical composition: …B-group cation occupancy: (1) the iron-magnesium-manganese amphibole group, (2) the calcic amphibole group, (3) the sodic-calcic amphibole group, and (4) the sodic amphibole group. The chemical formulas for selected amphiboles from each of the four compositional groups are given in the

  • iron–porphyrin group (biochemistry)

    circulatory system: Blood: …of subunits, each containing an iron–porphyrin group attached to a protein. The distribution of hemoglobins in just a few members of a phylum and in many different phyla argues that the hemoglobin type of molecule must have evolved many times with similar iron–porphyrin groups and different proteins.

  • iron-spinel series (mineralogy)

    spinel: …B is chromium; and the magnetite (iron-spinel) series, in which B is iron.

  • Ironbridge (bridge, England, United Kingdom)

    Ironbridge, structure that is generally considered the first cast-iron bridge, spanning the River Severn at Ironbridge, near Coalbrookdale, in Shropshire, England. It is now a British national monument. The bridge’s semicircular arch spans 100.5 feet (30.6 m) and has five arch ribs, each cast in t

  • ironclad (ship)

    Ironclad, type of warship developed in Europe and the United States in the mid-19th century, characterized by the iron casemates that protected the hull. In the Crimean War (1853–56) the French and British successfully attacked Russian fortifications with “floating batteries,” ironclad barges

  • Irondequoit Bay (inlet, New York, United States)

    Irondequoit Bay, inlet of Lake Ontario in western New York state, U.S., just northeast of Rochester. It is 4 miles (6 km) long and 0.5 to 1 mile (0.8 to 1.6 km) wide. A channel connects with Lake Ontario at the northeastern end of the bay. The Irondequoit Creek enters the bay from the south, and

  • Ironhead (count of Capua)

    Italy: The south, 774–1000: …its most notable prince being Pandulf I (Ironhead; 961–981).

  • Irons, Jeremy (British actor)

    Jeremy Irons, British actor whose performances were noted for their sophistication and gravitas. Irons made his London stage debut in Godspell (1973) and appeared on Broadway in The Real Thing (1984, Tony Award). After his screen debut in Nijinsky (1980), Irons won notice for his performance in The

  • Ironside, Edmund Ironside, 1st Baron (British field marshal)

    William Edmund Ironside, 1st Baron Ironside, British field marshal. After serving in the South African War, he commanded Allied forces in World War I in northern Russia (1918) and later in northern Persia (1920). He subsequently commanded forces in India (1928–31) and in the Middle East. At the

  • Ironside, of Archangel and of Ironside, William Edmund Ironside, 1st Baron (British field marshal)

    William Edmund Ironside, 1st Baron Ironside, British field marshal. After serving in the South African War, he commanded Allied forces in World War I in northern Russia (1918) and later in northern Persia (1920). He subsequently commanded forces in India (1928–31) and in the Middle East. At the

  • Ironside, William Edmund Ironside, 1st Baron (British field marshal)

    William Edmund Ironside, 1st Baron Ironside, British field marshal. After serving in the South African War, he commanded Allied forces in World War I in northern Russia (1918) and later in northern Persia (1920). He subsequently commanded forces in India (1928–31) and in the Middle East. At the

  • ironstone (geology)

    sedimentary rock: Iron-rich sedimentary rocks: …iron-rich minerals and chert—and (2) ironstone—noncherty, essentially clastic-textured, iron-rich minerals of local extent.

  • ironstone china (pottery)

    Ironstone china, type of stoneware introduced in England early in the 19th century by Staffordshire potters who sought to develop a porcelain substitute that could be mass-produced. The result of their experiments was a dense, hard, durable stoneware that came to be known by several names—e.g.,

  • Ironstone Plateau (plateau, Southern Sudan)

    South Sudan: Relief: The Ironstone Plateau lies between the Nile-Congo watershed and the clay plain; its level country is marked with inselbergs (isolated hills rising abruptly from the plains). On the Uganda border there are massive ranges with peaks rising to more than 10,000 feet (3,000 metres). The Imatong…

  • Ironstone, Mount (mountain, Australia)

    Great Western Tiers: …Mersey in the northwest; from Mount Ironstone, the highest peak (4,736 feet [1,444 m]), they slope gradually to the south. Their eastern face overlooks the Macquarie River valley. The large drop afforded by streams plunging over the edge of the mountains is used in the Great Lake–South Esk and the…

  • Ironton (Ohio, United States)

    Huntington: …cities of Ashland, Kentucky, and Ironton, Ohio. During much of the 20th century it was a significant river and rail point of transfer, but that role has diminished. Railroad equipment, steel, coal, fabricated metal, mining equipment, rebuilt machinery, rubber products, chemicals, and clothing are some of the city’s diversified products.…

  • Ironweed (work by Kennedy)

    William Kennedy: Ironweed (1983), which brought Kennedy widespread acclaim and won him the 1984 Pulitzer Prize for fiction, recounts a few days in the life of Francis Phelan (Billy Phelan’s father), an alcoholic vagrant drifting through life in Albany at the height of the Depression. Also published…

  • Ironweed (film by Babenco [1987])

    William Kennedy: …with Francis Ford Coppola) and Ironweed (1987); and two plays, Grand View (1996) and In the System (2003). He coauthored two children’s books with his son Brendan Kennedy: Charlie Malarkey and the Belly Button Machine (1986) and Charlie Malarkey and the Singing Moose (1994).

  • ironweed (plant)

    Ironweed, any of about 500 species of perennial plants constituting the genus Vernonia of the family Asteraceae. Small herbaceous species are distributed throughout the world, while shrubs and trees are native primarily to tropical regions. Members of the genus have lance-shaped, toothed leaves

  • Ironwood (Michigan, United States)

    Ironwood, city, Gogebic county, western Upper Peninsula of Michigan, U.S. Ironwood lies along the Montreal River at the Wisconsin border, some 90 miles (145 km) east of Duluth, Minn. It is the retail centre of a bistate urban complex in the Gogebic Range that includes the communities of Wakefield

  • Ironwood Forest National Monument (national monument, Arizona, United States)

    Ironwood Forest National Monument, ecologically rich region of the Sonoran Desert, southern Arizona, U.S., about 25 miles (40 km) northwest of Tucson. It was established in 2000 and covers approximately 200 square miles (520 square km), encompassing portions of the Sawtooth, Waterman, Silver Bell,

  • ironwork

    Ironwork, architectural features of buildings, artwork, utensils, and weapons made of iron. A brief treatment of ironwork follows. For full treatment, see metalwork: Iron. The earliest iron artifacts, dating from about 4000 bce, were made from meteoric iron and were therefore rare. Smelting iron

  • irony (linguistic and literary device)

    Irony, linguistic and literary device, in spoken or written form, in which real meaning is concealed or contradicted. That may be the result of the literal, ostensible meaning of words contradicting their actual meaning (verbal irony) or of a structural incongruity between what is expected and what

  • Irony of American History, The (work by Niebuhr)

    Reinhold Niebuhr: Political activist: His book The Irony of American History (1952), while justifying American anti-Communist policies, gave much attention to criticism of American messianism and the American tendency to engage in self-righteous crusades. He always attacked American claims to special virtue. Early he favoured the recognition by the United States…

  • Iroquoian languages

    Iroquoian languages, family of about 16 North American Indian languages aboriginally spoken around the eastern Great Lakes and in parts of the Middle Atlantic states and the South. Mohawk, Oneida, Onondaga, Cayuga, and Seneca, all originally spoken in New York, along with Tuscarora (originally

  • Iroquois (people)

    Iroquois, any member of the North American Indian tribes speaking a language of the Iroquoian family—notably the Cayuga, Cherokee, Huron, Mohawk, Oneida, Onondaga, Seneca, and Tuscarora. The peoples who spoke Iroquoian languages occupied a continuous territory around Lakes Ontario, Huron, and Erie

  • Iroquois Book of Rites, The (work by Hale)

    Horatio Hale: His most important work, The Iroquois Book of Rites (1883), summarizes much of his research and reconstructs the later prehistory of the tribes of the Six Nations.

  • Iroquois Confederacy (American Indian confederation)

    Iroquois Confederacy, confederation of five (later six) Indian tribes across upper New York state that during the 17th and 18th centuries played a strategic role in the struggle between the French and British for mastery of North America. The five original Iroquois nations were the Mohawk

  • Iroquois Falls (Ontario, Canada)

    Iroquois Falls, town, Cochrane district, east-central Ontario, Canada. It lies along the Abitibi River, just west of Lake Abitibi, 190 miles (300 km) north-northwest of North Bay. The town was named for the falls on the river, where, according to Indian legend, Iroquois braves, asleep in their war

  • Iroquois League (American Indian confederation)

    Iroquois Confederacy, confederation of five (later six) Indian tribes across upper New York state that during the 17th and 18th centuries played a strategic role in the struggle between the French and British for mastery of North America. The five original Iroquois nations were the Mohawk

  • IRP (political party, Iran)

    Iran: Political process: …outset of the revolution, the Islamic Republic Party was the ruling political party in Iran, but it subsequently proved to be too volatile, and Khomeini ordered it disbanded in 1987. The Muslim People’s Republic Party, which once claimed more than three million members, and its leader, Ayatollah Mohammad Kazem Shariat-Madari,…

  • IRPT (political party, Tajikistan)

    Tajikistan: Centralization and opposition sidelined: He accused the Islamic Renaissance Party of Tajikistan (IRPT)—which under the peace agreement was one of the opposition groups entitled to a percentage of government posts—of extremism and began dismissing members of the party from their official positions. The party itself, however, remained legal in Tajikistan. Meanwhile, Rahmonov…

  • ?Irq al-Subay? (desert region, Saudi Arabia)

    Arabian Desert: Physiography: ?Irq al-Subay? (?irq is the singular form of ‘urūq and is the source of the French-derived English word erg for large areas of sand), northwest of Riyadh in Najd, dams the middle Wadi Al-Jarab drainage system. A small cluster of broad transverse dunes has formed…

  • Irr (astronomy)

    astronomy: Study of other galaxies and related phenomena: Irregular galaxies number only a few percent of all stellar systems and exhibit none of the regular features associated with spirals or ellipticals.

  • Irr I (galaxy)

    galaxy: Irregular galaxies: …two types of irregular galaxies, Irr I and Irr II. The Irr I type is the most common of the irregular systems, and it seems to fall naturally on an extension of the spiral classes, beyond Sc, into galaxies with no discernible spiral structure. They are blue, are highly resolved,…

  • Irr II (galaxy)

    galaxy: Irregular galaxies: …irregular galaxies, Irr I and Irr II. The Irr I type is the most common of the irregular systems, and it seems to fall naturally on an extension of the spiral classes, beyond Sc, into galaxies with no discernible spiral structure. They are blue, are highly resolved, and have little…

  • Irr! Gr?nt! (work by Solstad)

    Dag Solstad: His novel Irr! Gr?nt! (1969; “Patina! Green!”) described the efforts of a peasant student to escape his limited background. Solstad’s fiction took a more directly political turn with the novel Arild Asnes, 1970 (1971), which traced the development of a young man to the point at which…

  • Irra (ancient god)

    Nergal: He was identified with Irra, the god of scorched earth and war, and with Meslamtaea, He Who Comes Forth from Meslam. Cuthah (modern Tall Ibrāhīm) was the chief centre of his cult. In later thought he was a “destroying flame” and had the epithet sharrapu (“burner”). Assyrian documents of…

  • irradiance (physics)

    light: Energy transport: …an electromagnetic wave is its irradiance, or intensity, which equals the rate at which energy passes a unit area oriented perpendicular to the direction of propagation. The time-averaged irradiance I for a harmonic electromagnetic wave is related to the amplitudes of the electric and magnetic fields: I = ε0c2E0B0/2 watts…

  • irradiation (food processing)

    food preservation: Food irradiation: Food irradiation involves the use of either high-speed electron beams or high-energy radiation with wavelengths smaller than 200 nanometres, or 2000 angstroms (e.g., X-rays and gamma rays). These rays contain sufficient energy to break chemical bonds and ionize molecules that lie in their path.…

  • irradiation

    Radiation therapy, the use of ionizing radiation (high-energy radiation that displaces electrons from atoms and molecules) to destroy cancer cells. Radiation has been present throughout the evolution of life on Earth. However, with the discovery of X-rays in 1895 by German physicist Wilhelm Conrad

  • irrational belief (psychology)

    mental disorder: Cognitive psychotherapy: …unsupported—what Ellis called an “irrational belief.” An example of such a belief is that one must be loved and approved of by everyone in order to be happy or to have a sense of self-worth. This is irrational first because it cannot possibly be achieved—no one is loved or…

  • irrational exuberance (economics)

    Robert J. Shiller: …investors, what he termed “irrational exuberance,” contradicted the once dominant assumption that markets are inherently rational (a view developed by Fama in the 1960s and early ’70s) and led him to argue that financial markets are subject to “bubbles,” or rapid increases in asset prices to unsustainable levels. Shiller…

  • Irrational Man (film by Allen [2015])

    Woody Allen: 2000 and beyond: Irrational Man (2015), an existentially comic thriller set in a New England university town, featured Joaquin Phoenix as a disillusioned and dissipated philosophy professor who decides to kill a family court judge after overhearing that he is likely to award parental custody rights to an…

  • irrational number (mathematics)

    Irrational number, any real number that cannot be expressed as the quotient of two integers. For example, there is no number among integers and fractions that equals the square root of 2. A counterpart problem in measurement would be to find the length of the diagonal of a square whose side is one

  • irrationalism (philosophy)

    Irrationalism, 19th- and early 20th-century philosophical movement that claimed to enrich the apprehension of human life by expanding it beyond the rational to its fuller dimensions. Rooted either in metaphysics or in an awareness of the uniqueness of human experience, irrationalism stressed the

  • Irrawaddy dolphin (mammal)

    dolphin: Conservation status: …chinensis), the Irrawaddy dolphin (Orcaella brevirostris), and the Australian snubfin dolphin (O. heinsohni). The most vulnerable dolphins include the Ganges river dolphin (Platanista gangetica) and the Indus river dolphin (P. minor), which are classified as endangered species

  • Irrawaddy River (river, Myanmar)

    Irrawaddy River, principal river of Myanmar (formerly Burma), running through the centre of the country. Myanmar’s most important commercial waterway, it is about 1,350 miles (2,170 km) long. Its name is believed to derive from the Sanskrit term airāvatī, meaning “elephant river.” The river flows

  • Irreconcilable Differences (film by Shyer [1984])

    Drew Barrymore: …Stephen King novel, and in Irreconcilable Differences, for which she earned a Golden Globe nomination for her supporting role as a child who sues her business-oriented parents for emancipation.

  • irredentism (territorial claim)

    Irredentism, territorial claim based on a national, ethnic, or historical basis. The term irredentism is derived from the Italian word irredento (“unredeemed”). It originally referred to an Italian political movement during the late 1800s and early 1900s that sought to detach predominantly

  • Irredentist (Italian patriots)

    Irredentist, any of the Italian patriots prominent in the last quarter of the 19th century and the early 20th century who sought to deliver Italian lands from foreign rule. Their name was derived from the words Italia irredenta (“unredeemed Italy”), and their object was to emancipate the lands of T

  • Irredentista (Italian patriots)

    Irredentist, any of the Italian patriots prominent in the last quarter of the 19th century and the early 20th century who sought to deliver Italian lands from foreign rule. Their name was derived from the words Italia irredenta (“unredeemed Italy”), and their object was to emancipate the lands of T

  • irreducible hernia (physiology)

    hernia: …other organs or structures, becoming irreducible. A strangulated hernia is one in which the circulation of blood through the hernia is impeded by pinching at the narrowest part of the passage; congestion is followed by inflammation, infection, and gangrene. The tighter the constriction, the more rapidly these events take place;…

  • irreferentialism (philosophy)

    philosophy of mind: Irreferentialism: ” It has been noted how, in relation to introspection, Wittgenstein resisted the tendency of philosophers to view people’s inner mental lives on the familiar model of material objects. This is of a piece with his more general criticism of philosophical theories, which he…

  • irreflexive relation (logic)

    formal logic: Classification of dyadic relations: …? is said to be irreflexive (example: “is greater than”). If ? is neither reflexive nor irreflexive—i.e., if (?x)?xx · (?x)~?xx —then ? is said to be nonreflexive (example: “admires”).

  • irregular cluster (astronomy)

    galaxy: Irregular clusters: Irregular clusters are large loosely structured assemblages of mixed galaxy types (mostly spirals and ellipticals), totaling perhaps 1,000 or more systems and extending out 10,000,000 to 50,000,000 light-years. The Virgo and Hercules clusters are representative of this class.

  • irregular crystal (meteorology)

    climate: Snow and sleet: spatial dendrites, capped columns, and irregular crystals. The size and shape of the snow crystals depend mainly on the temperature of their formation and on the amount of water vapour that is available for deposition. The two principal influences are not independent; the possible water vapour admixture of the air…

  • irregular flower (plant anatomy)

    flower: Form and types: …and snapdragons, is irregular or zygomorphic.

  • irregular galaxy (astronomy)

    astronomy: Study of other galaxies and related phenomena: Irregular galaxies number only a few percent of all stellar systems and exhibit none of the regular features associated with spirals or ellipticals.

  • irregular ode

    Irregular ode, a rhymed ode that employs neither the three-part form of the Pindaric ode nor the two- or four-line stanza that typifies the Horatian ode. It is also characterized by irregularity of verse and stanzaic structure and by lack of correspondence between parts called pseudo-Pindaric ode

  • Irregulars (Irish military organization)

    Irish Republican Army: …latter group, known as “Irregulars,” began to organize armed resistance against the new independent government.

  • irrelevant conclusion, fallacy of (logic)

    fallacy: Material fallacies: (3) The fallacy of irrelevant conclusion is committed when the conclusion changes the point that is at issue in the premises. Special cases of irrelevant conclusion are presented by the so-called fallacies of relevance. These include ( a) the argument ad hominem (speaking “against the man” rather…

  • Irreplaceable (song by Beyoncé)

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