| | - intersex
- in biology, an organism having physical characteristics intermediate between a true male and a true female of its species. The condition usually results from extra chromosomes or a hormonal abnormality during embryological development. The sex mosaic, or gynandromorph, is an intersexual organism that has male parts on one side of ...
- interstate commerce
- in U.S. constitutional law, any commercial transactions or traffic that cross state boundaries or that involve more than one state. The traditional concept that the free flow of commerce between states should not be impeded has been used to effect a wide range of regulations, both federal and state. A ...
- Interstate Commerce Commission
- (1887-1996), the first regulatory agency established in the United States, and a prototype for independent government regulatory bodies. See regulatory agency.
- interstellar medium
- region between the stars that contains vast, diffuse clouds of gases and minute solid particles. Such tenuous matter in the interstellar medium of the Milky Way system, in which the Earth is located, accounts for about 5 percent of the Galaxy's total mass.
- intertropical convergence zone
- belt of converging trade winds and rising air that encircles the Earth near the Equator. The rising air produces high cloudiness, frequent thunderstorms, and heavy rainfall; the doldrums, oceanic regions of calm surface air, occur within the zone. The ITCZ shifts north and south seasonally with the Sun. Over the ...
- Intertype
- (trademark), typesetting machine similar to Linotype that sets type in full lines called slugs, long used to set newspaper copy. The Intertype machine incorporates a keyboard, a magazine that contains continuously reused type matrices, a casting mechanism, and a distribution system for returning used matrices to the magazine. Like Linotype ...
- interval
- in music, the inclusive distance between one tone and another, whether sounded successively (melodic interval) or simultaneously (harmonic interval). In Western tonality, intervals are measured by their relationship to the diatonic scales in the major-minor system, by counting the lines and spaces between the given notes (always upward from the ...
- interval estimation
- in statistics, the evaluation of a parameter-for example, the mean (average)-of a population by computing an interval, or range of values, within which the parameter is most likely to be located. Intervals are commonly chosen such that the parameter falls within with a 95 or 99 percent probability, called the ...
- interval training
- method of competitive training in which rest and exercise intervals of controlled duration are alternated. Rest intervals allow time for the athlete's pulse rate to return to near normal before beginning the next exercise period. During exercise intervals, the athlete performs at a specified level of performance, slightly less than ...
- intestate succession
- in the law of inheritance, succession to property that has not been disposed of by a valid last will or testament. Although laws governing intestate succession vary widely in different jurisdictions, they share the common principle that the estate should devolve upon persons standing in some kinship relation with the ...
- intestinal gas
- material contained within the digestive tract that consists principally of swallowed air and partly of by-products of digestion. In humans the digestive tract contains normally between 150 and 500 cubic cm (10 and 30 cubic inches) of gas. During eating, air is swallowed into the stomach; this is either eructated ...
- intestinal juice
- clear to pale yellow, watery secretion composed of hormones, digestive enzymes, mucus, and neutralizing substances released from the glands and mucous-membrane lining of the small and large intestines. Intestinal juice neutralizes hydrochloric acid coming from the stomach; releases gastrointestinal hormones into the bloodstream; and contains digestive enzymes that facilitate the ...
- intestinal obstruction
- functional or mechanical blockage of the alimentary canal. Functional blockage occurs when the muscles of the intestinal wall fail to contract normally in the wavelike sequence (peristalsis) that propels the intestinal contents. Mechanical obstructions include a narrowing of the channel (stricture), adhesions, tumours, the presence of a foreign object, pressure ...
- intestinal squeeze
- pain and possible injury to the small or large intestine caused by expansion of trapped gases when a person, especially a pilot or underwater diver, goes from areas of greater pressure to areas of less pressure. Under normal atmospheric conditions, intestinal discomfort can be felt when air or gas collects ...
- intestine
- tubular part of the alimentary canal that extends from the stomach to the anus. The intestine is the site of most chemical digestive processes and the place where digested food materials are either absorbed for use by the body or collected into feces for elimination. The anterior part of the ...
- Inthanon, Mount
- mountain in northwestern Thailand that is the country's highest peak (8,481 feet [2,585 m]). It lies southwest of Chiang Mai, in a spur of the Danen Range between the Chaem (west) and Ping (east) rivers.
- Inti
- in Inca religion, the sun god; he was believed to be the ancestor of the Incas. Inti was at the head of the state cult, and his worship was imposed throughout the Inca empire. He was usually represented in human form, his face portrayed as a gold disk from which ...
- Intimism
- variety of late 19th- and early 20th-century painting that made an intense exploration of the domestic interior as subject matter. It was practiced principally by Pierre Bonnard and Edouard Vuillard, the two most distinguished members of the Nabis. To convey the warmth, comfort, and quiet isolation of interior scenes, Bonnard ...
- Intolerable Acts
- (1774), in U.S. colonial history, four punitive measures enacted by the British Parliament in retaliation for acts of colonial defiance, together with the Quebec Act establishing a new administration for the territory ceded to Britain after the French and Indian War (1754-63).
- Intolerance
- epic American silent film, released in 1916, that is notable for its vast sets and for its intricate plot structure. A plea for tolerance, it was director D.W. Griffith's response to the censorship and controversy that arose over the overt racism found in his previous film, The Birth of a ...
- intonation
- in phonetics, the melodic pattern of an utterance. Intonation is primarily a matter of variation in the pitch level of the voice (see also tone), but in such languages as English, stress and rhythm are also involved. Intonation conveys differences of expressive meaning (e.g., surprise, anger, wariness).
- Intracoastal Waterway
- navigable toll-free shipping route, extending for about 3,000 miles (4,800 km) along the Atlantic Ocean and Gulf of Mexico coasts in the southern and eastern United States. It utilizes sounds, bays, lagoons, rivers, and canals and is usable in many portions by deep-draft vessels. The route is federally maintained and ...
- Intramuros
- urban district and historic walled city within Metropolitan Manila, in the Philippines. The name, from the Spanish word meaning "within walls," refers to the fortified city founded at the mouth of the Pasig River shortly after 1571 by the Spanish conquistador Miguel Lopez de Legazpi.
- intrigue, comedy of
- in dramatic literature, a comic form in which complicated conspiracies and stratagems dominate the plot. The complex plots and subplots of such comedies are often based on ridiculous and contrived situations with large doses of farcical humour. An example of comedy of intrigue is William Shakespeare's Comedy of Errors (first ...
- intrinsic factor
- a glycoprotein (i.e., a complex compound containing both polysaccharide and protein components) with which vitamin B12 (cyanocobalamin) must combine to be absorbed by the gut. Intrinsic factor is secreted by parietal cells of the gastric glands in the stomach, where it binds with the vitamin. Thus bound, intrinsic factor protects ...
- introspection
- (from Latin introspicere, "to look within"), the process of observing the operations of one's own mind with a view to discovering the laws that govern the mind. In a dualistic philosophy, which divides the natural world (matter, including the human body) from the contents of consciousness, introspection is the chief ...
- introvert and extravert
- basic personality types according to the theories of the 20th-century Swiss psychiatrist Carl Jung. According to these theories, an introvert is a person whose interest is generally directed inward toward his own feelings and thoughts, in contrast to an extravert, whose attention is directed toward other people and the outside ...
- introverted quatrain
- a quatrain having an enclosed rhyme. An example of an introverted quatrain is the In Memoriam stanza (named for the poem by Alfred, Lord Tennyson), which has an abba rhyme scheme. An introverted stanza may also be called an envelope.
- Intruder in the Dust
- novel by American author William Faulkner, published in 1948. Set in Faulkner's fictional Yoknapatawpha county, the novel combines the solution of a murder mystery with an exploration of race relations in the South. Charles ("Chick") Mallison, a 16-year-old white boy, feels that he must repay a debt of honour to ...
- intrusive rock
- igneous rock formed from magma forced into older rocks at depths within the Earth's crust, which then slowly solidifies below the Earth's surface, though it may later be exposed by erosion. Igneous intrusions form a variety of rock types. See also extrusive rock.
- Intuit Inc.
- provider of financial, accounting, and tax-preparation software for individuals and small businesses. Intuit Inc. was founded in 1983 by American entrepreneurs Scott Cook and Tom Proulx. The company headquarters is in Mountain View, Calif.
- intuition
- in philosophy, the power of obtaining knowledge that cannot be acquired either by inference or observation, by reason or experience. As such, intuition is thought of as an original, independent source of knowledge, since it is designed to account for just those kinds of knowledge that other sources do not ...
- intuitionism
- In metaethics, a form of cognitivism that holds that moral statements can be known to be true or false immediately through a kind of rational intuition. In the 17th and 18th centuries, intuitionism was defended by Ralph Cudworth, Henry More (1614-87), Samuel Clarke (1675-1729), and Richard Price (1723-91); in the ...
- intuitionism
- school of mathematical thought introduced by the 20th-century Dutch mathematician L.E.J. Brouwer that contends the primary objects of mathematical discourse are mental constructions governed by self-evident laws. Intuitionists have challenged many of the oldest principles of mathematics as being nonconstructive and hence mathematically meaningless. Compare formalism; logicism.
- intussusception
- telescoping of a segment of the intestine into an adjacent segment, producing a mechanical obstruction of the alimentary canal. Primary intussusception is sometimes congenital and rarely appears later than the third year of life; it arises in the course of intestinal development, but the mechanism producing it is unknown.
- Inugsuk culture
- Eskimo culture that developed from the Thule culture (q.v.) in northern Greenland during the 12th and 13th centuries. It was distinguished by an increased dependence on hunting by means of a kayak (a one-man skin boat) and implements associated with this development. Dog-drawn sleds and umiaks (large, open skin boats) ...
- Inuit language
- the northeastern division of the Eskimo languages, spoken in northern Alaska, Canada, and Greenland.
- Inukai Tsuyoshi
- Japanese politician and prime minister whose assassination marked the end of party participation in the Japanese government in the period preceding World War II.
- inulin
- polysaccharide that is a commercial source of the sugar fructose. It occurs in many plants of the family Asteraceae (Compositae), particularly in such roots and tubers as the dahlia and the Jerusalem artichoke. Inulin forms a white, crystalline powder that is as sweet as sucrose. The inulin molecule is a ...
- inulin clearance
- procedure by which the filtering capacity of the glomeruli (the main filtering structures of the kidney) is determined by measuring the rate at which inulin, the test substance, is cleared from blood plasma. Inulin is the most accurate substance to measure because it is a small, inert polysaccharide molecule that ...
- Inuvik
- northwestern region of the Northwest Territories, Canada. Inuvik region was created in the early 1970s by the territorial government and was formerly part of Mackenzie and Franklin districts. It extends from Wrigley northward along the middle reaches of the Mackenzie River, which forms its heartland, to the river's delta on ...
- Inuvik
- town, Inuvik region, Northwest Territories, Canada. It lies along the East Channel of the Mackenzie River delta, just east of the northernmost point of the Yukon. Planned as a model community by the Canadian government, with an Inuit (Eskimo) name meaning "place of man," it was built (1954-62) on firm ...
- Invar
- alloy of iron that expands very little when heated; it contains 64 percent iron and 36 percent nickel. Invar was formerly used for absolute standards of length measurement and is now used for surveying tapes and in watches and various other temperature-sensitive devices. The trademark name was selected by the ...
- Invasion of Privacy on the Internet: Year in Review 2001
- In the year 2000 concerns about privacy in cyberspace became an issue of international debate. As reading and writing, health care and shopping, and sex and gossip increasingly took place in cyberspace, citizens around the world seemed concerned that the most intimate details of their daily lives were being monitored, ...
- Invasion of the Body Snatchers
- American science-fiction film, released in 1956, that was directed by Don Siegel and has been hailed as one of the most intelligent films of the genre.
- invasive species
- any nonnative species that significantly modifies or disrupts the ecosystems it colonizes. Such species may arrive in new areas through natural migration, but they are often introduced by the activities of other species. Human activities, such as those involved in global commerce and the pet trade, are considered to be ...
- Invasive Species: Exotic Intruders: Year in Review 2011
- The increasing prevalence of invasive species and their impact on biodiversity briefly pushed global warming and climate change out of the environmental spotlight, especially since the United Nations and many conservation organizations recognized 2010 as the International Year of Biodiversity. In particular, the activities of two invasive groups of animals ...
- invention
- in music, any of a number of markedly dissimilar compositional forms dating from the 16th century to the present. While its exact meaning has never been defined, the term has often been affixed to compositions of a novel, progressive character-i.e., compositions that do not fit established categories. The earliest-known use ...
- invention
- the act of bringing ideas or objects together in a novel way to create something that did not exist before.
- inventor
- a person who brings ideas or objects together in a novel way to create an invention, something that did not exist before.
- inventory
- in business, any item of property held in stock by a firm, including finished goods ready for sale, goods in the process of production, raw materials, and goods that will be consumed in the process of producing goods to be sold. Inventories appear on a company's balance sheet as an ...
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