- Crassula (plant genus)
Crassulaceae: Major genera: Crassula, with about 200 species, includes the commonly cultivated jade plant (Crassula ovata), which is native to South Africa. Surprisingly, some species of Crassula have evolved into aquatic plants. Sedum, with some 400 species known as stonecrops, contains many favourite rock-garden plants, and other species…
- Crassula ovata (botany, Crassula ovata)
Saxifragales: Major families: …commonly cultivated Crassula ovata (jade plant) is native to South Africa. Sedum (420 species) contains many favourite rock-garden plants, and other species are grown as pot plants. Surprisingly, some species of Crassula have evolved into aquatic plants.
- Crassulaceae (plant family)
Crassulaceae, the stonecrop family of about 30 genera and 1,400 species of perennial herbs or low shrubs, the largest family in the order Saxifragales. The family is widespread from tropical to boreal regions but is concentrated in arid regions of the world. Many species are succulents and are
- Crassulacean Acid Metabolism (botany)
agave: Physical description: …a photosynthetic pathway known as crassulacean acid metabolism (CAM), in which carbon dioxide is fixed at night to limit the amount of water lost from the leaf stomata.
- crassulacean metabolism (botany)
agave: Physical description: …a photosynthetic pathway known as crassulacean acid metabolism (CAM), in which carbon dioxide is fixed at night to limit the amount of water lost from the leaf stomata.
- Crassus Dives Mucianus, Publius Licinius (Roman politician)
Publius Licinius Crassus Dives Mucianus was a Roman politician who supported the agrarian reforms of the tribune Tiberius Gracchus. Brother of the orator and jurist Publius Mucius Scaevola, Crassus was adopted into the gens (“clan”) of the Licinii. He was the father-in-law of the reformer Gaius
- Crassus, Lucius Licinius (Roman lawyer)
Lucius Licinius Crassus was a lawyer and politician who is usually considered to be one of the two greatest Roman orators before Cicero, the other being Marcus Antonius (143–87). Both men are vividly portrayed in Cicero’s De oratore (55 bce). Crassus launched his legal career in 119 by successfully
- Crassus, Marcus Licinius (Roman statesman)
Marcus Licinius Crassus was a politician who in the last years of the Roman Republic formed the so-called First Triumvirate with Julius Caesar and Pompey to challenge effectively the power of the Senate. His death led to the outbreak of the Civil War between Caesar and Pompey (49–45). Crassus fled
- Crataegus (plant)
hawthorn, (genus Crataegus), large genus of thorny shrubs or small trees in the rose family (Rosaceae), native to the north temperate zone. Many species are common to North America, and a number of cultivated varieties are grown as ornamentals for their attractive flowers and fruits. The hawthorn
- Crataegus × lavallei (plant)
hawthorn: Common species: The Lavalle hawthorn (C. ×lavallei) is a compact vase-shaped tree with dense glossy foliage.
- Crataegus cordata (plant)
hawthorn: Common species: The Washington hawthorn (C. phaenopyrum) is famous for its red autumn colour and its abundant clusters of orange-red fruits that persist on the twigs well into winter; it is somewhat susceptible to rust but is otherwise a durable and much-used ornamental. Downy, or red, hawthorn (C.…
- Crataegus crus-galli (plant)
hawthorn: Common species: …thorned American species is the cockspur hawthorn (C. crus-galli), with extremely long, slender thorns up to 8 cm (3 inches) long; a thornless variety is also available. The Washington hawthorn (C. phaenopyrum) is famous for its red autumn colour and its abundant clusters of orange-red fruits that persist on the…
- Crataegus laevigata (plant)
hawthorn: Common species: …hawthorn (Crataegus monogyna) and the smooth hawthorn, also known as whitethorn, (C. laevigata). The smooth hawthorn has given rise to several cultivated varieties with showier flower clusters in pink and red, though it and other ornamental species often suffer from leaf spot, fire blight, and cedar hawthorn rust, which cause…
- Crataegus monogyna (plant)
hawthorn: Common species: …are the common hawthorn (Crataegus monogyna) and the smooth hawthorn, also known as whitethorn, (C. laevigata). The smooth hawthorn has given rise to several cultivated varieties with showier flower clusters in pink and red, though it and other ornamental species often suffer from leaf spot, fire blight, and cedar…
- Crataegus phaenopyrum (plant)
hawthorn: Common species: The Washington hawthorn (C. phaenopyrum) is famous for its red autumn colour and its abundant clusters of orange-red fruits that persist on the twigs well into winter; it is somewhat susceptible to rust but is otherwise a durable and much-used ornamental. Downy, or red, hawthorn (C.…
- Cratchit family (fictional characters)
The Cratchit family is an impoverished hardworking and warmhearted family in A Christmas Carol (1843) by Charles Dickens. The Cratchits are: Dickens wrote A Christmas Carol to make his readers aware of the living conditions of the working poor in England, and he presented the Cratchits as a
- Crater (constellation)
Crater, constellation in the southern sky at about 11 hours right ascension and 20° south in declination. The brightest star in Crater is Delta Crateris, with a visual magnitude of 3.56. In Greek mythology this constellation is associated with Corvus (Latin: “Raven”) and Hydra (Latin: “Water
- crater (wine vessel)
krater, ancient Greek vessel used for diluting wine with water. It usually stood on a tripod in the dining room, where wine was mixed. Kraters were made of metal or pottery and were often painted or elaborately ornamented. In Homer’s Iliad the prize offered by Achilles for the footrace at
- crater (geology)
crater, circular depression in the surface of a planetary body. Most craters are the result of impacts of meteorites or of volcanic explosions. Meteorite craters are more common on the Moon and Mars and on other planets and natural satellites than on Earth, because most meteorites either burn up in
- crater lake (geology)
volcano: Gas clouds: …the sudden overturn of a crater lake may contain suffocating or poisonous gases such as carbon dioxide, carbon monoxide, hydrogen sulfide, and sulfur dioxide. At Lake Nyos, a crater lake in Cameroon, West Africa, more than 1,700 people were killed by a sudden release of carbon
- Crater Lake (lake, Oregon, United States)
Crater Lake, deep, clear, intensely blue lake located within a huge volcanic caldera in the Cascade Range, southwestern Oregon, U.S., about 50 miles (80 km) northeast of Medford. The lake and its surrounding region became Crater Lake National Park in 1902, with an area of 286 square miles (741
- Crater Lake National Park (park, Oregon, United States)
Crater Lake: …and its surrounding region became Crater Lake National Park in 1902, with an area of 286 square miles (741 square km). By the early 21st century the park had more than 90 miles (145 km) of hiking trails.
- crater row (geology)
volcano: Fissure vents: …fountains along the fissure produce crater rows of small spatter and cinder cones. The fragments that form a spatter cone are hot and plastic enough to weld together, while the fragments that form a cinder cone remain separate because of their lower temperature.
- Crater, Battle of the (American Civil War [1864])
Battle of the Crater, Union defeat on July 30, 1864, during the American Civil War (1861–65), part of the Siege of Petersburg, Virginia. In the final full year of the war, Union forces besieged the town of Petersburg, to the south of the Confederate capital of Richmond. But a well-conceived attempt
- Craterellus cornucopioides (fungus)
mushroom: Other mushrooms: cibarius) and the horn-of-plenty mushroom (Craterellus cornucopioides). Puffballs (family Lycoperdaceae), stinkhorns, earthstars (a kind of puffball), and bird’s nest fungi are usually treated with the mushrooms. Another group of ascomycetes includes the cup fungi, with a cuplike or dishlike fruiting structure, sometimes highly coloured.
- Crateromys (rodent)
cloud rat: …genus Phloeomys (two species), whereas bushy-tailed cloud rats are classified in the genus Crateromys (four species).
- Crateromys australis (rodent)
cloud rat: Bushy-tailed cloud rats: The Dinigat bushy-tailed cloud rat (C. australis) is about the same size as C. heaneyi and is found only on Dinagat Island, north of Mindanao. It has tawny fur on the head and back and an orange-brown belly.
- Crateromys heaneyi (rodent)
cloud rat: Bushy-tailed cloud rats: …the most recent being the Panay Island cloud rat (C. heaneyi) in 1996. Additional undiscovered species may live on other Philippine islands. All cloud rats are intimately tied to old-growth tropical forests, and most populations are in danger owing to overhunting and deforestation. Three of the four Crateromys species have…
- Crateromys paulus (rodent)
cloud rat: Bushy-tailed cloud rats: …length of 25 cm, the Ilin bushy-tailed cloud rat (C. paulus) is the smallest of the group, with short, coarse, brown fur, a cream-coloured underside, and a short, hairy, tricoloured tail. It was found on Ilin Island, off the southern coast of Mindoro, but may already be extinct on Ilin…
- Crateromys schadenbergi (rodent)
cloud rat: Bushy-tailed cloud rats: The Luzon bushy-tailed cloud rat (C. schadenbergi) is fairly common in the mountain forests of northern Luzon, but this is the only island on which it is found. It is the largest of the genus, with a body length of 35 to 39 cm, and is…
- Craters of the Moon National Monument and Preserve (region, Idaho, United States)
Craters of the Moon National Monument and Preserve, region of volcanic cones, craters, and lava flows near the foot of the Pioneer Mountains in south-central Idaho, U.S., 18 miles (29 km) southwest of Arco. The craters (more than 35), which have probably been extinct only a few millennia, were part
- Craterus (Macedonian general)
Craterus was one of the most brilliant generals of the Macedonian king Alexander the Great (ruled 336–323). Accompanying Alexander on his expedition of conquest in Asia, he played a key role in the defeat of the Indian prince Porus at the Battle of the Hydaspes (326). During the opening phase of
- Crates (Greek actor and author)
Crates was an ancient Greek actor and author of comedies. He is considered one of the lesser poets of Attic Old Comedy; his contemporaries were Cratinus and Aristophanes. Crates acted in comedies by Cratinus before he turned to writing. He won three victories at the theatrical contests held as part
- Crates of Mallus (Greek philosopher)
Crates of Mallus was a Stoic philosopher, from Mallus in Cilicia, primarily important as a grammarian. His chief work was a commentary on Homer. Leader of the literary school and head of the library of Pergamum, he was the chief representative of the allegorical theory of exegesis, maintaining that
- Crates of Thebes (Greek philosopher)
Crates of Thebes was a Cynic philosopher, a pupil of Diogenes. He gave up his fortune and made it his mission to castigate vice and pretense. Hipparchia, daughter of a wealthy Thracian family and sister of the philosopher Metrocles, forced her parents to allow her to join him in his ascetic and
- Crateuas (Greek artist and physician)
Crateuas was a classical pharmacologist, artist, and physician to Mithradates VI, king of Pontus (120–63 bc). Crateuas’ drawings are the earliest known botanical illustrations. His work on pharmacology was the first to illustrate the plants described; it also classified the plants and explained
- Cratevas (Greek artist and physician)
Crateuas was a classical pharmacologist, artist, and physician to Mithradates VI, king of Pontus (120–63 bc). Crateuas’ drawings are the earliest known botanical illustrations. His work on pharmacology was the first to illustrate the plants described; it also classified the plants and explained
- Cratinus (Greek poet)
Cratinus was a Greek poet, regarded in antiquity as one of the three greatest writers, with Eupolis and Aristophanes, of the vigorous and satirical Athenian Old Comedy. Only about 460 fragments survive of Cratinus’ 27 known plays, the earliest of which was written not long after 450 bc. His
- Cratippus (Greek historian)
Thucydides: Scope and plan of the History: …is known: that three historians, Cratippus (a younger contemporary), Xenophon (who lived a generation later), and Theopompus (who lived in the last third of the 4th century), all began their histories of Greece where Thucydides left off. Xenophon, one might say, began the next paragraph nearly as abruptly as Thucydides…
- Crato (Brazil)
Crato, city, southern Ceará estado (state), northeastern Brazil. It lies in the Balança Mountains at 1,384 feet (422 metres) above sea level, just southwest of Juazeiro do Norte. It was elevated to city status in 1853. Crato is a commercial centre for a region producing cattle, sugarcane, rice,
- craton (geology)
craton, the stable interior portion of a continent characteristically composed of ancient crystalline basement rock. The term craton is used to distinguish such regions from mobile geosynclinal troughs, which are linear belts of sediment accumulations subject to subsidence (i.e., downwarping). The
- Cratty, Mabel (American social worker)
Mabel Cratty was an American social worker, longtime general secretary of the Young Women’s Christian Association (YWCA), under whose leadership the American membership and branches of the organization increased fourfold. Cratty studied briefly at Lake Erie Seminary (now College) and graduated from
- Cratylus (work by Plato)
Plato: Early dialogues of Plato: The Cratylus (which some do not place in this group of works) discusses the question of whether names are correct by virtue of convention or nature. The Crito shows Socrates in prison, discussing why he chooses not to escape before the death sentence is carried out.…
- Cratylus (Greek philosopher)
skepticism: Ancient skepticism: …hand, Heracleitus and his pupil Cratylus thought that the world was in such a state of flux that no permanent, unchangeable truth about it could be found; and Xenophanes, a wandering poet and philosopher, doubted whether humans could distinguish true from false knowledge.
- cravat (clothing accessory)
cravat, the name given to the neck scarf worn by Croatian soldiers in the service of the French army during the reign of Louis XIV. The word cravate is a corruption of the French word for “Croatian.” The term came to be applied in England and France to any kind of a neckerchief worn by a man. After
- Cravate, La (film by Jodorowsky [1957])
Alejandro Jodorowsky: Early work: …the short La Cravate (1957; The Severed Heads), about a young man (played by Jodorowsky) who falls in love with the proprietor of a shop where one can swap out one’s head. In the early 1960s Jodorowsky, Spanish-born French author Fernando Arrabal, and French artist and author Roland Topor formed…
- Crave (play by Kane)
Sarah Kane: Plays: In Crave (also 1998), four voices identified only by the letters C, M, B, and A appear as four separate bodies but behave almost like one self—as if one individual splintered. Kane experimented with new form and structure in this play, employing poetic and rhythmic language…
- Craveirinha, José (East African writer)
José Craveirinha was a Mozambican journalist, story writer, and poet. Craveirinha was the son of a Portuguese father and a black Mozambican mother. He was an ardent supporter of the anti-Portuguese group Frelimo during the colonial wars and was imprisoned in 1966. He was one of the pioneers of
- Craven (district, England, United Kingdom)
Craven, district, administrative county of North Yorkshire, historic county of Yorkshire, England. The traditional name applies to the distinctive limestone country of the central Pennines, where the gritstone-capped summits of Ingleborough, Pen-y-Ghent, and Whernside exceed 2,000 feet (610 metres)
- Craven, Danie (South African rugby player and administrator)
Danie Craven was a South African rugby union football player, coach, and administrator who was one of the most influential and controversial figures in the history of the sport. He was known as “Mr. Rugby” in South Africa. Craven played 16 Test (international) matches for South Africa, primarily as
- Craven, Daniel Hartman (South African rugby player and administrator)
Danie Craven was a South African rugby union football player, coach, and administrator who was one of the most influential and controversial figures in the history of the sport. He was known as “Mr. Rugby” in South Africa. Craven played 16 Test (international) matches for South Africa, primarily as
- Craven, Frank (American actor and author)
Frank Craven was an American actor, director, playwright, and producer who was best known for his performance as the stage manager in his production of Thornton Wilder’s Our Town (performed 1938) and for his domestic comedy The First Year (1920). Born into a theatrical family, he first appeared on
- Craven, Wes (American director and screenwriter)
Wes Craven was an American director and screenwriter who was known for his horror films, several of which are classics of the genre. Craven earned an undergraduate degree from Wheaton College (Wheaton, Illinois) in 1963 and went on to earn an M.A. in writing and philosophy from Johns Hopkins
- Craven, Wesley Earl (American director and screenwriter)
Wes Craven was an American director and screenwriter who was known for his horror films, several of which are classics of the genre. Craven earned an undergraduate degree from Wheaton College (Wheaton, Illinois) in 1963 and went on to earn an M.A. in writing and philosophy from Johns Hopkins
- Craven, WilliamCraven, Earl of (English courtier)
William Craven, earl of Craven was an English courtier known for his long association with the “winter queen” of Bohemia, the English princess Elizabeth, who was the consort of Frederick V, the elector Palatine. A Royalist during the English Civil Wars, Craven provided considerable financial
- crawdad (crustacean)
crayfish, any of numerous crustaceans (order Decapoda, phylum Arthropoda) constituting the families Astacidae (Northern Hemisphere), Parastacidae, and Austroastracidae (Southern Hemisphere). They are closely related to the lobster. Over half of the more than 500 species occur in North America.
- Crawdaddy Club (club, London, United Kingdom)
London clubs: …months during 1963 at the Crawdaddy Club, operated by promoter Georgio Gomelsky at the Station Hotel in respectable Richmond upon Thames, London. When the Stones left on a national tour to promote their first single, the Yardbirds, featuring guitar prodigy Eric Clapton, took their place at the Crawdaddy. Other suburban…
- Crawdaddy! (magazine)
Rock criticism: …1966 by editor Paul Williams, Crawdaddy! was the first magazine devoted to the notion of rock as the crucial aesthetic medium through which the emergent counterculture articulated its dreams and aspirations. A year later a 21-year-old entrepreneur, Jann Wenner, started Rolling Stone in the hippie capital, San Francisco, California. Both…
- crawfish (crustacean)
crayfish, any of numerous crustaceans (order Decapoda, phylum Arthropoda) constituting the families Astacidae (Northern Hemisphere), Parastacidae, and Austroastracidae (Southern Hemisphere). They are closely related to the lobster. Over half of the more than 500 species occur in North America.
- Crawford (county, Pennsylvania, United States)
Crawford, county, northwestern Pennsylvania, U.S., bordered to the west by Ohio. It consists of a hilly region on the Allegheny Plateau. Pymatuning State Park borders Pymatuning Reservoir in the southwestern corner of the county. Other waterways include Conneaut, Cussewago, French, and Oil creeks
- Crawford Notch (geological formation, New Hampshire, United States)
Appalachian Mountains: Study and exploration: …Timothy Nash, discoverer of the Crawford Notch (1771), which made possible communication between the coast and the Connecticut River valley; and Sir William Logan, first director of Canada’s geologic survey, who made a cross section of the geologic formation of the Gaspé Peninsula in 1844 and became the first European…
- Crawford Seeger, Ruth (American composer)
Ruth Crawford Seeger was a U.S. composer. She studied piano as a child and was self-taught as a composer until she entered the American Conservatory. After early works influenced by Alexander Scriabin, she wrote several astonishing serial pieces, including her String Quartet (1931). She married the
- Crawford v. Washington (law case)
Antonin Scalia: Judicial philosophy: , his majority opinion in Crawford v. Washington (2004), which found that the use of out-of-court statements by witnesses who are not present at trial violates the Sixth Amendment’s confrontation clause (which protects the right of criminal defendants to confront the witnesses against them). Scalia believed that issues that fell…
- Crawford, Adair (English physician and chemist)
alkaline-earth metal: History: …London chemists William Cruickshank and Adair Crawford in 1789 on examining a mineral (strontium carbonate) found in a lead mine at Strontian in Argyllshire, Scotland. Beryllia (beryllium oxide) was extracted from the mineral beryl and recognized as an earth by the French analytical chemist Nicolas-Louis Vauquelin in 1798. Though at…
- Crawford, Broderick (American actor)
Beau Geste: Susan Hayward, and Broderick Crawford.
- Crawford, Carl (American baseball player)
Tampa Bay Rays: Matt Garza, Evan Longoria, and Carl Crawford, the Rays posted a 95–67 record—a 29-game improvement from their 2007 mark of 66–96—and qualified for the first playoff appearance in the franchise’s history as AL East Division champions. In the American League Championship Series, the Rays bested the defending world champion Boston…
- Crawford, Cheryl (American actress and theater producer)
Cheryl Crawford was an American actress and theatre producer. She acted with the Theatre Guild from 1923 and became its casting manager (1928–30). She helped found the Group Theatre in 1931. A cofounder of the Actors Studio in 1947, she went on to serve as its executive producer. Her notable
- Crawford, Christina (American writer)
Joan Crawford: Crawford’s adopted daughter Christina published Mommie Dearest (1978), an account of the harsh childhood that Christina and an adopted brother had at their mother’s hands, and a film version was produced in 1981.
- Crawford, Cindy (American fashion model)
Cindy Crawford is an American fashion model and television personality who first gained fame in the 1980s and was among the first “supermodels.” Crawford grew up in DeKalb, Illinois, near Chicago, where her father worked as an electrician and her mother was employed as a bank teller. In 1982, while
- Crawford, Cynthia Ann (American fashion model)
Cindy Crawford is an American fashion model and television personality who first gained fame in the 1980s and was among the first “supermodels.” Crawford grew up in DeKalb, Illinois, near Chicago, where her father worked as an electrician and her mother was employed as a bank teller. In 1982, while
- Crawford, F. Marion (American author)
F. Marion Crawford was an American novelist noted for the vividness of his characterizations and settings. In his youth Crawford was shuttled between Italy and America; though he later chose to live in Italy, he remained a U.S. citizen and visited the country frequently. He became acquainted with
- Crawford, Francis Marion (American author)
F. Marion Crawford was an American novelist noted for the vividness of his characterizations and settings. In his youth Crawford was shuttled between Italy and America; though he later chose to live in Italy, he remained a U.S. citizen and visited the country frequently. He became acquainted with
- Crawford, Isabella Valancy (Canadian poet)
Isabella Valancy Crawford was a major 19th-century Canadian poet and one of the first important woman poets in Canada. She is especially noted for her vivid descriptions of the Canadian landscape. Details of Crawford’s life are sketchy. The daughter of a physician who emigrated to Canada in 1858,
- Crawford, Janie (fictional character)
Janie Crawford, fictional character, the spirited protagonist of Their Eyes Were Watching God by Zora Neale
- Crawford, Joan (American actress)
Joan Crawford was an American motion-picture actress who made her initial impact as a vivacious Jazz Age flapper but later matured into a star of psychological melodramas. She developed a glamorous screen image, appearing often as a sumptuously gowned, fur-draped, successful career woman. Crawford
- Crawford, Michael (British actor and singer)
The Knack…and How to Get It: …the film, Colin (played by Michael Crawford), a shy teacher, begs his housemate Tolen (Ray Brooks), who has the knack of bedding any woman he wants, to give him advice on how to do the same. Conflict arises when Colin finally meets his dream girl, Nancy (Rita Tushingham), whom his…
- Crawford, Ruth Porter (American composer)
Ruth Crawford Seeger was a U.S. composer. She studied piano as a child and was self-taught as a composer until she entered the American Conservatory. After early works influenced by Alexander Scriabin, she wrote several astonishing serial pieces, including her String Quartet (1931). She married the
- Crawford, Terence (American boxer)
Canelo Álvarez: Professional career: …the titles after losing to Terence Crawford by unanimous decision.
- Crawford, Thomas (American sculptor)
Thomas Crawford was a Neoclassical sculptor best known for his colossal Statue of Freedom, which was posthumously cast and hoisted atop the dome of the Capitol in Washington, D.C., amid great festivities in 1863. Crawford studied drawing at the National Academy of Design and trained as a
- Crawford, William Broderick (American actor)
Beau Geste: Susan Hayward, and Broderick Crawford.
- Crawford, William H(arris) (United States government official)
William H. Crawford was an American political leader of the early U.S. republic; he finished third in electoral votes in the four-candidate race for president in 1824. After living in Virginia and South Carolina, the Crawford family moved to Georgia, where William attended Moses Waddel’s Carmel
- Crawford, William Harris (United States government official)
William H. Crawford was an American political leader of the early U.S. republic; he finished third in electoral votes in the four-candidate race for president in 1824. After living in Virginia and South Carolina, the Crawford family moved to Georgia, where William attended Moses Waddel’s Carmel
- Crawfordsville (Indiana, United States)
Crawfordsville, city, seat (1823) of Montgomery county, west-central Indiana, U.S., on Sugar Creek, 46 miles (74 km) northwest of Indianapolis. Founded in 1823, it was named for Colonel William Crawford, an Indian fighter and popular politician who served (1815–25) in the cabinets of Presidents
- Crawfurd, John (British scholar and diplomat)
John Crawfurd was a Scottish Orientalist and East India Company employee who successfully combined scholarship and diplomatic abilities. Trained as a doctor in Edinburgh, Crawfurd was first appointed, at age 20, to the North-West Provinces of India. He was transferred in 1808 to Penang (Pinang),
- crawl (swimming)
freestyle, perhaps the most popular swimming stroke, used in both competitive and recreational swimming. It is performed by using an alternating overarm motion combined with a flutter kick. The freestyle has become the fastest of all strokes in the pool and is also the almost unanimous stroke of
- crawler (software)
computer: Internet and collaborative software: …Web search engines and “Web-crawling” programs that traverse the Web to gather and classify information. Web-crawling programs are a kind of agent software, a term for programs that carry out routine tasks for a user. They stem from artificial intelligence research and carry out some of the tasks of…
- crawler tractor (vehicle)
Caterpillar Inc.: …a prototype of the familiar “caterpillar” tractor in about 1904 (a similar track-type tractor was also patented in 1904 by British engineer David Roberts). The Holt tractor ran on continuous metal-belted tracks instead of wheels, and the tracks kept the heavy vehicle from sinking in mud or dirt. The new…
- Crawley (district, England, United Kingdom)
Crawley: district (borough) and town, administrative county of West Sussex, southern England. Most of the borough belongs to the historic county of Sussex, but its northern portion is within the historic county of Surrey.
- Crawley (England, United Kingdom)
Crawley, district (borough) and town, administrative county of West Sussex, southern England. Most of the borough belongs to the historic county of Sussex, but its northern portion is within the historic county of Surrey. Crawley is an ancient town, having received a charter from King John in 1202,
- Crawley, Ernest (British anthropologist)
cultural anthropology: Marxism and the collectors: …Frazer’s Golden Bough (1890) and Ernest Crawley’s Mystic Rose (1902). These rather encyclopaedic collections of customs, religious and magical practices, and other curious data were read with relish by the intellectual community; the theories that accompanied the collections were equally appreciated by evolutionary-minded anthropologists, as the theories were meant to…
- crawling (human locomotion)
crawling, a pattern of prone locomotion in which the abdomen is in contact with the surface of support. The onset of crawling is a major milestone in infant motor development that also heralds a dramatic and pervasive set of changes in psychological functioning. Crawling represents the culmination
- crawling (animal behavior)
nervous system: Annelids: The usual slow crawling movements of worms are mediated by a series of reflex arcs. During crawling, the contraction of muscles in one segment stimulates stretch receptors in the muscle. Impulses are carried over sensory nerves to the cord, causing motor neurons to send impulses to the longitudinal…
- crawling water beetle (insect)
Coleoptera: Annotated classification: Family Haliplidae (crawling water beetles) About 200 small aquatic species; wide geographical range. Family Hygrobiidae A few species (Hygrobia) widely distributed; aquatic; produce sound. Family Noteridae (burrowing water beetles)
- Crawshay’s zebra (mammal)
zebra: quagga crawshaii (Crawshay’s zebra), E. quagga borensis (half-maned zebra), E. quagga boehmi (Grant’s zebra), E. quagga chapmani (Chapman’s zebra), E. quagga burchellii (Burchell’s zebra), and E. quagga quagga (quagga, which is extinct). The mountain zebra is made up
- Craxi, Benedetto (Italian politician)
Bettino Craxi was an Italian politician who became his country’s first Socialist prime minister (1983–87). Craxi joined the Socialist Youth Movement in his late teens and became a member of the Italian Socialist Party’s central committee in 1957. He won a seat on the city council of Milan in 1960,
- Craxi, Bettino (Italian politician)
Bettino Craxi was an Italian politician who became his country’s first Socialist prime minister (1983–87). Craxi joined the Socialist Youth Movement in his late teens and became a member of the Italian Socialist Party’s central committee in 1957. He won a seat on the city council of Milan in 1960,
- Cray Computer Corporation (American corporation)
Seymour Cray: In 1989 Cray founded the Cray Computer Corporation. However, as microprocessor technology advanced and the demand for supercomputers fell in the post-Cold War era, Cray Computer filed for bankruptcy in 1995. Undaunted, Cray opened another company, SRC Computers, LLC, in August 1996, but he died two months later following an…
- Cray Inc. (American company)
Seymour Cray: …and founded his own firm, Cray Research Inc., with the intention of building the fastest computers in the world. This was largely realized through his innovative design of uniprocessor computers, which allowed simultaneous (parallel) processing. His company’s first supercomputer, the Cray-1, which came out in 1976, could perform 240 million…
- Cray Research, Inc. (American company)
Seymour Cray: …and founded his own firm, Cray Research Inc., with the intention of building the fastest computers in the world. This was largely realized through his innovative design of uniprocessor computers, which allowed simultaneous (parallel) processing. His company’s first supercomputer, the Cray-1, which came out in 1976, could perform 240 million…
- Cray, Seymour (American engineer)
Seymour Cray was an American electronics engineer and computer designer who was the preeminent designer of the large high-speed computers known as supercomputers. Cray graduated from the University of Minnesota in 1950 with a bachelor’s degree in electrical engineering. He began his career at