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  • cat’s-eye (gemstone)

    Cat’s-eye, any of several gemstones that, when cut en cabochon (in convex form, highly polished), display a luminous band reminiscent of the eye of a cat; this particular quality is termed chatoyancy. Precious, or oriental, cat’s-eye, the rarest and most highly prized, is a greenish chatoyant

  • cat’s-eye (ctenophore)

    ctenophore: common names—sea walnuts, sea gooseberries, cat’s-eyes.

  • cat’s-paw (knot)

    knot: …to a hook is the cat’s-paw. It is made by twisting two parts of a rope in opposite directions, forming two side-by-side eyes through which the base of the hook is passed so that a sling hangs from the hook. The knot thus formed can be used to lift loads…

  • cat, domestic (domesticated mammal)

    Cat, (Felis catus), domesticated member of the family Felidae, order Carnivora, and the smallest member of that family. Like all felids, domestic cats are characterized by supple low-slung bodies, finely molded heads, long tails that aid in balance, and specialized teeth and claws that adapt them

  • Cat, the (fictional character)

    Catwoman, cartoon character, a wily and agile professional thief and sometime love interest of superhero Batman. Clad in a skintight bodysuit and stylized mask and carrying a whip, Selina Kyle, also known as Catwoman, has frequently crossed and recrossed the line between villain and antiheroine. In

  • cat-eyed snake (reptile)

    Mangrove snake, (genus Boiga), any of about 30 species (family Colubridae) of weakly venomous, rear-fanged snakes, ranging from South Asia to Australia. They are at home on the ground and in trees; many catch birds at night. Because they have elliptical pupils and may be green-eyed, they are

  • cat-eyed snake (reptile, genus Leptodeira)

    cat snake: Often classified separately, cat-eyed snakes (Leptodeira) of the New World tropics are superficially similar to Old World cat snakes. Ten species of cat-eyed snakes occur in dry habitats from Mexico to Argentina. The most common species is the banded cat-eyed snake (L. annulata), which is found over the…

  • cat-o’-nine-tails (whip)

    Sing Sing: Frequently used was the cat-o’-nine-tails, a cruel whipping contraption whose lashes were often tipped with metal or barbs; its use was finally abolished by the New York State legislature in 1848. In addition, while Lynds was warden, inmates were expected to refrain from making noise, which included talking. With…

  • Cat: An Introduction to the Study of Backboned Animals, The (work by Mivart)

    Saint George Jackson Mivart: In 1881 he published The Cat: An Introduction to the Study of Backboned Animals, which is considered to rank with T.H. Huxley’s Crayfish for its accuracy, detail, and clarity.

  • catabolic reaction (biochemistry)

    Catabolism, the sequences of enzyme-catalyzed reactions by which relatively large molecules in living cells are broken down, or degraded. Part of the chemical energy released during catabolic processes is conserved in the form of energy-rich compounds (e.g., adenosine triphosphate [ATP]). Energy is

  • catabolism (biochemistry)

    Catabolism, the sequences of enzyme-catalyzed reactions by which relatively large molecules in living cells are broken down, or degraded. Part of the chemical energy released during catabolic processes is conserved in the form of energy-rich compounds (e.g., adenosine triphosphate [ATP]). Energy is

  • Catacka (people)

    Kiowa: …accompanied on the migration by Kiowa Apache, a small southern Apache band that became closely associated with the Kiowa. Guided by the Crow, the Kiowa learned the technologies and customs of the Plains Indians and eventually formed a lasting peace with the Comanche, Arapaho, and Southern Cheyenne. The name Kiowa…

  • cataclasis

    metamorphism: Dynamic metamorphism, or cataclasis, results mainly from mechanical deformation with little long-term temperature change. Textures produced by such adjustments range from breccias composed of angular, shattered rock fragments to very fine-grained, granulated or powdered rocks with obvious foliation and lineation. Large, pre-existing mineral grains may…

  • cataclastite (rock)

    Cataclastite, any rock produced by dynamic metamorphism during which faulting, granulation, and flowage may occur in previously crystalline parent rocks. When stress exceeds breaking strength, a rock yields by rupture. The rock may break as a unit, or individual minerals may be selectively

  • cataclismic variable star (astronomy)

    star: Explosive variables: The evolution of a member of a close double-star system can be markedly affected by the presence of its companion. As the stars age, the more massive one swells up more quickly as it moves away from the main sequence. It becomes so…

  • cataclysm (event)

    ballad: Disaster: Sensational shipwrecks, plagues, train wrecks, mine explosions—all kinds of shocking acts of God and man—were regularly chronicled in ballads, a few of which remained in tradition, probably because of some special charm in the language or the music. The shipwreck that lies in the…

  • Cataclysm in Kashmir

    On Oct. 8, 2005, a magnitude-7.6 Earthquake on the border between Pakistan’s North-West Frontier Province and Kashmir brought tragedy not only to Pakistan but to India and Afghanistan as well. The epicentre was near the city of Muzaffarabad. Several towns were effectively leveled. Schools collapsed

  • catacomb (subterranean cemetery)

    Catacomb, subterranean cemetery composed of galleries or passages with side recesses for tombs. The term, of unknown origin, seems to have been applied first to the subterranean cemetery under the Basilica of San Sebastiano (located on the Appian Way near Rome), which was reputed to have been the

  • Catacomb culture (archaeology)

    Cimmerian: …known to archaeologists as the “Catacomb” culture. This culture was ousted from southern Russia by the “Srubna” culture advancing from beyond the Volga just as the Cimmerians were ousted by the invading Scythians, but that upheaval took place in the second half of the 2nd millennium bc, and a gap…

  • catacomba (subterranean cemetery)

    Catacomb, subterranean cemetery composed of galleries or passages with side recesses for tombs. The term, of unknown origin, seems to have been applied first to the subterranean cemetery under the Basilica of San Sebastiano (located on the Appian Way near Rome), which was reputed to have been the

  • catacumba (subterranean cemetery)

    Catacomb, subterranean cemetery composed of galleries or passages with side recesses for tombs. The term, of unknown origin, seems to have been applied first to the subterranean cemetery under the Basilica of San Sebastiano (located on the Appian Way near Rome), which was reputed to have been the

  • catadioptric lens (optics)

    technology of photography: Mirror lenses: Images can also be formed by light reflected from curved mirrors. This method, long used in astronomical telescopes, is applied to long-focus lens systems of short overall length by folding the light path back onto itself. A mirror lens or catadioptric system has…

  • catadioptric telescope

    telescope: The Schmidt telescope: , designed a catadioptric telescope that satisfied the requirement of photographing larger celestial areas. A catadioptric telescope design incorporates the best features of both the refractor and the reflector—i.e., it has both reflective and refractive optics. The Schmidt telescope has a spherically shaped primary mirror. Since parallel light…

  • catadromous fish

    migration: Catadromous fish: Catadromous fish spend most of their lives in fresh water, then migrate to the sea to breed. This type is exemplified by eels of the genus Anguilla, numbering 16 species, the best-known of which are the North American eel (A. rostrata) and the…

  • catafalque (funerary architecture)

    Catafalque, ornate, often theatrical, usually movable funereal structure mounted on a stage to support a coffin for a lying-in-state. It is used for royalty and personages of distinction and is normally set up in a historic public hall, such as Westminster Hall, London, and the Capitol Rotunda in

  • Cataglyphis (insect genus)

    Sahara desert ant: …of ant in the genus Cataglyphis that dwell in the Sahara, particularly C. fortis and C. bicolor. The navigational capabilities of these ants have been the subject of numerous scientific investigations.

  • Catagonus wagneri (mammal)

    peccary: The Chacoan peccary (Catagonus wagneri) is the largest, weighing over 40 kg. It is also the least common, living only in the dry Chacoan region of South America (see Gran Chaco). About 5,000 are estimated to remain and were thought to be extinct by the scientific…

  • Çatal Hüyük (archaeological site, Turkey)

    Çatalhüyük, major Neolithic site in the Middle East, located near Konya in south-central Turkey. Excavations (1961–65) by the British archaeologist James Mellaart have shown that Anatolia in Neolithic times was the centre of an advanced culture. The earliest building period at Çatalhüyük is

  • Català language

    Catalan language, Romance language spoken in eastern and northeastern Spain—chiefly in Catalonia and Valencia—and in the Balearic Islands. It is also spoken in the Roussillon region of France, in Andorra (where it is the official language), and in the city of Alghero, Sardinia, Italy. Catalan is

  • Catalan (people)

    Pyrenees: People and economy: …of peoples, including the Andorrans, Catalans, Béarnais, and Basques. Each speaks its own dialect or language, and each desires to maintain and even augment its own autonomy while at the same time acknowledging a general unity among Pyrenean peoples. Of these groups, only the Andorrans have anything approaching a sovereign…

  • Catalan (island, Spain)

    Minorca, island of the Balearic Islands provincia (province) and comunidad autónoma (autonomous community), Spain. It is the second largest of the Balearic Islands and lies in the western Mediterranean Sea. Most of the island’s area of 258 square miles (668 square km) is dry, monotonous tableland

  • Catalan Atlas (work by Cresque)

    Sahara: Study and exploration: Abraham Cresque’s Catalan Atlas, published for Charles V of France in about 1375, renewed European interest in the desert. The atlas contained information based upon the knowledge of Jewish traders active in the Sahara. Its publication was followed by a period of intense Portuguese, Venetian, Genoese, and…

  • Catalan Company (Spanish mercenary army)

    Michael IX Palaeologus: …Byzantium employed as mercenaries the Catalan Company, led by Roger de Flor, which soon began attacking and robbing Byzantines and Turks alike. Hoping to get rid of them, Michael arranged the murder of Roger de Flor in the imperial palace in April 1305. The Catalans then rebelled and ravaged the…

  • Catalan corts (Spanish and Portuguese parliament)

    Cortes, a representative assembly, or parliament, of the medieval Iberian kingdoms and, in modern times, the national legislature of Spain and of Portugal. The Cortes developed in the Middle Ages when elected representatives of the free municipalities acquired the right to take part in the

  • Catalan forge (Spanish forge)

    Catalan forge, medieval Spanish forge that yielded malleable iron of excellent quality. A mixture of iron ore and charcoal was heated intensely for several hours in a forge, forming a spongy mass of iron permeated by slag. At the correct time, the glowing ball of iron was withdrawn from the forge

  • Catalan language

    Catalan language, Romance language spoken in eastern and northeastern Spain—chiefly in Catalonia and Valencia—and in the Balearic Islands. It is also spoken in the Roussillon region of France, in Andorra (where it is the official language), and in the city of Alghero, Sardinia, Italy. Catalan is

  • Catalan literature

    Catalan literature, the body of literature written in the Catalan language, a Romance language spoken primarily in the Spanish autonomous regions of Catalonia, Valencia, and the Balearic Islands. Catalan literature has its roots in the Occitan language and the poetic forms cultivated by the

  • Catalan Republic (Spanish history)

    Francesc Macià: …(April 1931), Macià proclaimed the Catalan Republic, although under pressure from Republicans and socialists he quickly withdrew it in return for a promise that the Republican government would grant home rule. One year later (September 9, 1932) the statute of Catalonian autonomy was promulgated.

  • Catalani, Alfredo (Italian composer)

    Alfredo Catalani, Italian composer of the popular opera La Wally (1892) and several other works that earned him a place among the most significant creative talents to emerge in Italian opera during the latter half of the 19th century. Catalani’s openness to international influences, particularly

  • Catalanides range (mountain range, Spain)

    Catalonia: Geography: …Mediterranean shoreline, and the low-lying Catalanides range separates the coastal plain from the Ebro river basin. The Catalanides have historically separated the industrial towns of the coast from the predominantly agricultural settlements of the hinterlands. North of the Catalanides is a high tableland that comprises most of Lleida province. The…

  • Catalão (city, Brazil)

    Catalão, city, southeastern Goiás estado (state), south-central Brazil. Situated in rolling uplands near the Paranaíba River, Catalão is a small commercial and manufacturing centre. Cattle and hogs raised in the region supply the city’s tanneries and meat-processing plants, which produce xarque

  • catalase (biochemistry)

    Catalase, an enzyme that brings about (catalyzes) the reaction by which hydrogen peroxide is decomposed to water and oxygen. Found extensively in organisms that live in the presence of oxygen, catalase prevents the accumulation of and protects cellular organelles and tissues from damage by

  • Catalaunian Plains, Battle of the (Roman history)

    Battle of the Catalaunian Plains, (ad 451), battle fought between the Huns under Attila and a mixed Roman and Visigoth force under Aetius and Theodoric I; it checked the Hunnic advance in Europe. The exact location of the encounter is in dispute, with opinion divided between Châlons and Troyes,

  • catalexis (prosody)

    Catalexis and acatalexis, in prosody, an omission or incompleteness in the last foot of a line or other unit in metrical verse and, conversely, the metrical completeness of such a

  • Çatalhüyük (archaeological site, Turkey)

    Çatalhüyük, major Neolithic site in the Middle East, located near Konya in south-central Turkey. Excavations (1961–65) by the British archaeologist James Mellaart have shown that Anatolia in Neolithic times was the centre of an advanced culture. The earliest building period at Çatalhüyük is

  • Catalina (work by Ibsen)

    Henrik Ibsen: First plays and directing: This work, Catilina (1850; Catiline), grew out of the Latin texts Ibsen had to study for his university examinations. Though not a very good play, it showed a natural bent for the theatre and embodied themes—the rebellious hero, his destructive mistress—that would preoccupy Ibsen as long as he lived.…

  • Catalina ceanothus (tree)

    Ceanothus: arboreus, called Catalina, or felt-leaf, ceanothus, an evergreen tree occurring on the islands off the coast of California, has leaves with a dark green upper surface and a dense white pubescence beneath. The tree, 5–8 m high, bears fragrant blue flowers in the early spring.

  • Catalina Island (island, California, United States)

    Santa Catalina Island, one of the Channel Islands, 22 miles (35 km) off the Pacific coast of California, U.S. The largest of the Santa Catalina group of the Channel Islands, it is 22 miles long and 8 miles (13 km) across at its greatest width and has an area of 74 square miles (192 square km). It

  • catalog house (business)

    Mail-order business, method of merchandising in which the seller’s offer is made through mass mailing of a circular or catalog or through an advertisement placed in a newspaper or magazine and in which the buyer places an order by mail. Delivery of the goods may be made by freight, express, or

  • Catalog Rules: Author and Title Entries (library science)

    library: Catalog standardization: …joint British and American effort, Catalog Rules: Author and Title Entries, first published in 1908 and revised in 1967. A further revision was published in 1978 as Anglo-American Cataloguing Rules, second edition; it is commonly referred to as AACR2.

  • catalog verse (literature)

    Catalog verse, verse that presents a list of people, objects, or abstract qualities. Such verse exists in almost all literatures and is of ancient origin. The genealogical lists in the Bible and the lists of heroes in epics such as Homer’s Iliad are types of catalog verse, as are more modern poems

  • Catalogue (work by Abhdisho bar Berikha)

    Abhdisho bar Berikha: …also wrote the metrically structured Catalogue (1316), which is not only a list of his own works but also the best reference known for the writings of Nestorian Syrian and Greek churchmen-theologians and a valuable source on Syrian literary life.

  • Catalogue of the Indian Collections in the Museum of Fine Arts, Boston (work by Coomaraswamy)

    Ananda Kentish Coomaraswamy: Coomaraswamy’s definitive Catalogue of the Indian Collections in the Museum of Fine Arts, Boston was published in five volumes during 1923–30; the History of Indian and Indonesian Art (1927) became the standard text in the field. The Transformation of Nature in Art (1934) and Figures of Speech…

  • Catalogue of the Mesozoic and Cenozoic Plants of North America, A (work by Knowlton)

    Frank Hall Knowlton: …of a valuable reference book, A Catalogue of the Mesozoic and Cenozoic Plants of North America (1919). The same year, he published a paper, “Evolution of Geologic Climates,” that summarized his conclusions about the Earth’s climate before the Pleistocene Epoch (i.e., prior to 2.6 million years ago). Although the work…

  • Catalogues of Women (Greek chronicle)

    Hesiod: Spurious works.: …numerous extant fragments of the Catalogues of Women, which deals primarily with women who through union with gods become mothers of heroes and ancestresses of noble families. Papyruses deciphered since the 1890s, and especially in the 1950s and ’60s, have added much to knowledge of its content and have made…

  • Catalogus Plantarum circa Gissam sponte nascentium (book by Dillenius)

    Johann Jakob Dillenius: His Catalogus Plantarum circa Gissam sponte nascentium (1718; “Catalog of Plants Originating Naturally Around Giessen”) treated 980 species of higher plants, 200 mosses and related forms, and 160 fungi found near Giessen, where he attended the university. In August 1721 he went to England, where in…

  • Catalonia (autonomous community, Spain)

    Catalonia, comunidad autónoma (autonomous community) and historic region of Spain, encompassing the northeastern provincias (provinces) of Girona, Barcelona, Tarragona, and Lleida. The autonomous community of Catalonia occupies a triangular area in the northeastern corner of Spain. It is bordered

  • Catalonia, National Art Museum of (museum, Barcelona, Spain)

    National Art Museum of Catalonia, museum in the National Palace (Palau Nacional) in Barcelona that incorporates into one collection what was once the Catalonia Museum of Art (Museu d’Art de Catalunya, founded 1934; noted for its collection of Romanesque, Gothic, Renaissance, and Baroque art) and

  • Catalpa (plant)

    Catalpa, (genus Catalpa), genus of eight species of trees (family Bignoniaceae) native to eastern Asia, eastern North America, and the West Indies. The common, or southern, catalpa (C. bignonioides), which yields a durable timber, is one of the most widely planted ornamental species. Catalpas have

  • catalpa (plant)

    Catalpa, (genus Catalpa), genus of eight species of trees (family Bignoniaceae) native to eastern Asia, eastern North America, and the West Indies. The common, or southern, catalpa (C. bignonioides), which yields a durable timber, is one of the most widely planted ornamental species. Catalpas have

  • Catalpa bignonioides (tree)
  • catalpa family (plant family)

    Bignoniaceae, the trumpet creeper or catalpa family of the mint order of flowering plants (Lamiales). It contains about 110 genera and more than 800 species of trees, shrubs, and, most commonly, vines, chiefly of tropical America, tropical Africa, and the Indo-Malayan region. They form an important

  • catalufa (fish)

    bigeye: The glasseye snapper (P. cruentatus), also called the catalufa, about 30 cm long, is found in both the Atlantic and Pacific. The popeye catalufa (Pristigenys serrula) is a Pacific ocean species.

  • Cataluña (autonomous community, Spain)

    Catalonia, comunidad autónoma (autonomous community) and historic region of Spain, encompassing the northeastern provincias (provinces) of Girona, Barcelona, Tarragona, and Lleida. The autonomous community of Catalonia occupies a triangular area in the northeastern corner of Spain. It is bordered

  • Catalunya (autonomous community, Spain)

    Catalonia, comunidad autónoma (autonomous community) and historic region of Spain, encompassing the northeastern provincias (provinces) of Girona, Barcelona, Tarragona, and Lleida. The autonomous community of Catalonia occupies a triangular area in the northeastern corner of Spain. It is bordered

  • Catalunya, Museu Nacional d’Art de (museum, Barcelona, Spain)

    National Art Museum of Catalonia, museum in the National Palace (Palau Nacional) in Barcelona that incorporates into one collection what was once the Catalonia Museum of Art (Museu d’Art de Catalunya, founded 1934; noted for its collection of Romanesque, Gothic, Renaissance, and Baroque art) and

  • catalysis (chemical process)

    Catalysis, in chemistry, the modification of the rate of a chemical reaction, usually an acceleration, by addition of a substance not consumed during the reaction. The rates of chemical reactions—that is, the velocities at which they occur—depend upon a number of factors, including the chemical

  • catalyst (chemistry)

    Catalyst, in chemistry, any substance that increases the rate of a reaction without itself being consumed. Enzymes are naturally occurring catalysts responsible for many essential biochemical reactions. Most solid catalysts are metals or the oxides, sulfides, and halides of metallic elements and of

  • catalyst poison (chemistry)

    Catalyst poison, substance that reduces the effectiveness of a catalyst in a chemical reaction. In theory, because catalysts are not consumed in chemical reactions, they can be used repeatedly over an indefinite period of time. In practice, however, poisons, which come from the reacting substances

  • catalytic combustion (chemical process)

    combustion: History of the study of combustion: …various gases; he also discovered catalytic combustion—the oxidation of combustibles on a catalytic surface accompanied by the release of heat but without flame.

  • catalytic converter

    Catalytic converter, in automobiles, a component of emission control systems used to reduce the discharge of noxious and polluting gases from the internal-combustion engine. The catalytic converter consists of an insulated chamber containing a honeycomb structure or pellets coated with catalyst

  • catalytic cracking (chemical process)

    petroleum refining: Catalytic cracking: The use of thermal cracking units to convert gas oils into naphtha dates from before 1920. These units produced small quantities of unstable naphthas and large amounts of by-product coke. While they succeeded in providing a small increase in gasoline yields, it was…

  • catalytic reforming (chemical process)

    hydrocarbon: Source and synthesis: …possible processes, known generally as catalytic reforming, in which alkanes are converted to arenes by a combination of isomerization and dehydrogenation events.

  • catamaran (boat)

    Catamaran, twin-hulled sailing and powered boat developed for sport and recreation in the second half of the 20th century. Its design is based on a raft of two logs bridged by planks that had earlier been used by peoples in the Indonesian archipelago and throughout Polynesia and Micronesia. Early

  • Catamarca (province, Argentina)

    Catamarca, provincia (province), northwestern Argentina, separated from Chile by the Andes Mountains. The province is generally mountainous with intermontane tablelands and valleys (some fertile, others completely arid). The sandy desert on the west side of the Aconquija Mountains is referred to as

  • Catamarca (Argentina)

    Catamarca, city, capital of Catamarca provincia (province), northwestern Argentina. It is located on the Río del Valle de Catamarca, a river between the two south-pointing spurs of the Andean peaks of Ambato and Ancasti. Originally named Londres, it was founded by the explorer Juan Pérez de Zurita

  • Catamitus (Greek mythology)

    Ganymede, in Greek legend, the son of Tros (or Laomedon), king of Troy. Because of his unusual beauty, he was carried off either by the gods or by Zeus, disguised as an eagle, or, according to a Cretan account, by Minos, to serve as cupbearer. In compensation, Zeus gave Ganymede’s father a stud of

  • catamount (mammal species)

    Puma, (Puma concolor), large brownish New World cat comparable in size to the jaguar—the only other large cat of the Western Hemisphere. The puma, a member of the family Felidae, has the widest distribution of any New World mammal, with a range extending from southeastern Alaska to southern

  • Catán, Daniel (Mexican-born American composer)

    Daniel Catán, Mexican-born American composer (born April 3, 1949, Mexico City, Mex.—died April 9, 2011, Austin, Texas), was instrumental in exposing audiences around the world to contemporary Spanish-language operas. He was credited in 1994 as the first Mexican composer to stage a completely

  • Catana (Italy)

    Catania, city, eastern Sicily, Italy, in the broad plain of Catania on the Ionian seacoast, south of Mount Etna. The city was founded in 729 bc by Chalcidians (settlers from Chalcis in the Greek island of Euboea) from Naxos, 50 miles (80 km) north. It acquired importance in the 5th century bc with

  • Catana (Greek colony)

    coin: Artistic development: Catana used the artist Heracleidas to design a splendid facing head of Apollo. Selinus abandoned its parsley leaf and issued some remarkable types, notably that of Apollo and Artemis in their quadriga and, on the reverse, the local hero sacrificing at an altar, alluding to…

  • Cātaṉār (Tamil writer)

    South Asian arts: Epics: …of which is missing), by Cātaṉār, continues the story of the Cilappatikāram; the heroine is Mātavi’s daughter, MaîimKkalai, a dancer and courtesan like her mother. Maṇimēkalai is torn between her passion for a princely lover and her spiritual yearnings, the first encouraged by her grandmother, the second by her mother.…

  • Catanduanes (island, Philippines)

    Catanduanes, island, east-central Philippines, in the Philippine Sea. It is separated from southeastern Luzon (Rungus Point) by the shallow Maqueda Channel. Farming is diversified (rice, corn [maize], copra, abaca) on the hilly, rolling land. Virac, the chief port, is on the southern coast in a

  • Catanduva (Brazil)

    Catanduva, city, in the highlands of north-central São Paulo estado (state) Brazil, lying on the São Domingos River at 1,630 feet (497 metres) above sea level. Originally called Vila Adolfo, the settlement was given town status in 1909 and was made the seat of a municipality in 1917. Coffee and

  • Catanei, Vannozza (Italian mistress)

    Cesare Borgia: Youth and education: …his father’s most famous mistress, Vannozza Catanei. His father, at that time Cardinal Rodrigo Borgia, was vice chancellor of the church and had had three earlier children by other mistresses. Cesare was, however, the oldest of the four children born to Vannozza and Rodrigo (the others were Juan, Lucrezia, and…

  • Catania (Italy)

    Catania, city, eastern Sicily, Italy, in the broad plain of Catania on the Ionian seacoast, south of Mount Etna. The city was founded in 729 bc by Chalcidians (settlers from Chalcis in the Greek island of Euboea) from Naxos, 50 miles (80 km) north. It acquired importance in the 5th century bc with

  • Catania, Gulf of (gulf, Italy)

    Gulf of Catania, inlet of the Ionian Sea on the eastern coast of Sicily. About 20 miles (32 km) long and 5 miles (8 km) wide, it lies between Cape Campolato (south) and Cape Molini (north). The gulf receives the Simeto River below Catania, its chief

  • Catanzaro (Italy)

    Catanzaro, city, capital of Calabria regione (region), southern Italy, at an elevation of 1,125 feet (343 metres) overlooking the Gulf of Squillace, southeast of Cosenza. Founded about the 10th century as Catasarion, a Byzantine town, it was taken in 1059 by the Norman leader Robert Guiscard.

  • catapano (Byzantine administrator)

    Italy: The south, 774–1000: …through a local ruler, or catepan, who headed an administrative and fiscal system that was apparently more complex and stable than that of the exarchs had been. Culturally, the Byzantines were by now entirely Greek, and southern Calabria was, as already noted, Greek-speaking; in Puglia, however, the Italian-speaking Lombards dominated,…

  • cataphoresis (chemistry)

    Electrophoresis, the movement of electrically charged particles in a fluid under the influence of an electric field. If the liquid rather than the particles is set in motion—e.g., through a fixed diaphragm—the phenomenon is called electroosmosis. Electrophoresis is used to analyze and separate

  • cataphract (cavalry)

    military technology: The Byzantine cataphract: …armoured horse archer called a cataphract. Pronoia, which formed the core of the Byzantine army’s strength during the period of its greatest efficiency in the 8th through 10th centuries, entailed the adoption of the Hunnish composite recurved bow by native troopers.

  • Cataphrygian heresy (religion)

    Montanism, a heretical movement founded by the prophet Montanus that arose in the Christian church in Phrygia, Asia Minor, in the 2nd century. Subsequently it flourished in the West, principally in Carthage under the leadership of Tertullian in the 3rd century. It had almost died out in the 5th and

  • cataplana (food)

    Portugal: Daily life and social customs: A seafood stew known as cataplana (for the hammered copper clamshell-style vessel in which it is cooked) is ubiquitous throughout the country. In many areas meat is seldom eaten, although the Alentejo region is known for its pork and Trás-os-Montes for cured meats. Cozido a portuguesa, a stew made with…

  • cataplexy (medical disorder)

    Cataplexy, a sudden brief impairment of muscle tone, such as a limpness of the arms or legs, that is often precipitated by an emotional response such as laughter or startle and is sometimes so dramatic as to cause the person to fall down. Cataplexy occurs in about 70 percent of people affected by

  • catapult (ancient weapon)

    catapult: The term catapult too can refer to these weapons, but more often it designates a larger engine that is used to hurl stones from a single long arm swinging through the vertical plane. Nearly all catapults employed in ancient and medieval artillery operated by a sudden release…

  • catapult (military weaponry)

    Catapult, mechanism for forcefully propelling stones, spears, or other projectiles, in use mainly as a military weapon since ancient times. The ancient Greeks and Romans used a heavy crossbowlike weapon known as a ballista to shoot arrows and darts as well as stones at enemy soldiers. The term

  • cataract (eye disorder)

    Cataract, opacity of the crystalline lens of the eye. Cataracts occur in 50 percent of people between the ages of 65 and 74 and in 70 percent of people over the age of 75. Typical age-related cataracts can cause cloudy vision, glare, colour vision problems, changes in eyeglass prescription, and,

  • cataract (waterfall)

    Cataract, a waterfall (q.v.), especially one containing great volumes of water rushing over a

  • Catarchic astrology (pseudoscience)

    astrology: Purposes of astrology: Catarchic (pertaining to beginnings or sources) astrology determines whether or not a chosen moment is astrologically conducive to the success of a course of action begun in it. Basically in conflict with a rigorous interpretation of genethlialogy, it allows the individual (or corporate body) to…

  • Catargiu, Lascăr (prime minister of Romania)

    Lascăr Catargiu, Romanian statesman, four times prime minister (1866, 1871–76, 1889, 1891–95), who played a leading role in national affairs through the country’s early years of independence. In 1858 Catargiu served on the Moldavian divan ad hoc (representative commission) formed to determine the

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