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  • triptych (art)

    altarpiece: …of two painted panels, a triptych has three panels, and a polyptych has four or more panels. A winged altarpiece is one equipped with movable wings that can be opened or closed over a fixed central part, thereby allowing various representations to be exposed to view. The term reredos is…

  • triptych (cinematic technique)

    Napoléon: …filming process known as a triptych, an early precursor to today’s IMAX that required shooting with three synchronized cameras. This allowed the right and left portions of the screen to at times present different images from what was being shown in the centre of the screen. At other times, the…

  • Triptych, The (work by Puccini)

    Giacomo Puccini: Mature work and fame: …study emerged Il trittico (The Triptych; New York City, 1918), three stylistically individual one-act operas—the melodramatic Il tabarro (The Cloak), the sentimental Suor Angelica, and the comic Gianni Schicchi. His last opera, based on the fable of Turandot as told in the play Turandot by the 18th-century Italian dramatist…

  • Tripura (people)

    Bangladesh: Ethnic groups: …Marma (Magh or Mogh), the Tripura (Tipra), and the Mro; the Khomoi (Kumi), the Kuki, and the Mizo (formerly called Lushai) are among the smaller groups. Since the mid-1970s ethnic tensions and periodic violence have marked the Chittagong Hill Tracts, where many peoples long resident in the area have objected…

  • Tripura (state, India)

    Tripura, state of India. It is located in the northeastern part of the subcontinent. It is bordered to the north, west, and south by Bangladesh, to the east by the state of Mizoram, and to the northeast by the state of Assam. It is among the smallest of India’s states and is located in an isolated

  • Tripura Hills (hills, India)

    Tripura Hills, hills in eastern Tripura state, northeastern India. The Tripura Hills, by way of the Mizo Hills of Mizoram state on the east, form a low western extension of the Purvachal, a strategically located highland region fronting the border with Myanmar (Burma). The region belongs to the

  • Tripura Plains (plains, India)

    Tripura Plains, plains in southwestern Tripura state, northeastern India. The Tripura Plains, extending over about 1,600 square miles (4,150 square km), are located on a section of the greater Ganges-Brahmaputra lowlands (also called the Eastern Plains), west of the Tripura Hills. They are dotted

  • Triratna (Buddhism and Jainism)

    Triratna, (Sanskrit: “Three Jewels”) in Buddhism the Triratna comprises the Buddha, the dharma (doctrine, or teaching), and the sangha (the monastic order, or community). One becomes a Buddhist by saying the words “I go to the Buddha for refuge, I go to the Doctrine for refuge, I go to the Order

  • trireme (vessel)

    Trireme, oar-powered warship that reached its highest point of development in the eastern Mediterranean during the 5th century bce. Light, fast, and maneuverable, it was the principal naval vessel with which Persia, Phoenicia, and the Greek city-states vied for mastery of the seas from the Battle

  • trisecting the angle (geometry)

    Trisecting the Angle: Archimedes' Method: Euclid’s insistence (c. 300 bc) on using only unmarked straightedge and compass for geometric constructions did not inhibit the imagination of his successors. Archimedes (c. 285–212/211 bc) made use of neusis (the sliding and maneuvering of a measured length, or marked straightedge) to solve one…

  • Trisecting the Angle: Archimedes’ Method

    Euclid’s insistence (c. 300 bc) on using only unmarked straightedge and compass for geometric constructions did not inhibit the imagination of his successors. Archimedes (c. 285–212/211 bc) made use of neusis (the sliding and maneuvering of a measured length, or marked straightedge) to solve one of

  • Trisecting the Angle: The Quadratrix of Hippias

    Hippias of Elis (fl. 5th century bc) imagined a mechanical device to divide arbitrary angles into various proportions. His device depends on a curve, now known as the quadratrix of Hippias, that is produced by plotting the intersection of two moving line segments, as shown in the animation.

  • Trisevgene (work by Palamás)

    Kostís Palamás: His play Trisevgene (1903; “The Thrice Noble”) has lyric rather than dramatic merits. Palamás also wrote short stories, and his criticism significantly raised the level of modern Greek literary criticism.

  • Trishala (mother of Mahavira)

    Trishala, mother of Mahavira, the most recent of the Tirthankaras (“Ford-makers,” i.e., saviours) of Jainism, a religion of India. Trishala, like the mother of the Buddha, was a member of the Kshatriya (warrior) caste. According to Jain tradition, Trishala lived some 2,500 years ago and, like the

  • Trishashtishalakapurusha-charita (work by Hemachandra)

    Hemachandra: …and several poems, including the Trishashtishalakapurusha-charita (“Deeds of the 63 Illustrious Men”), a Sanskrit epic of the history of the world as understood by Jain teachers. He was also a logician. Although derivative in many ways, his works have become classics, setting high standards for Sanskrit learning.

  • tri?ik?ā (Buddhism)

    Tri?ik?ā , (Sanskrit: “threefold training”) in Buddhism, the three types of learning required of those who seek to attain enlightenment. The threefold training comprises all aspects of Buddhist practices. Arranged in a progressive order, the three are: (1) ?īla (“moral conduct”), which makes one’s

  • Trismegistos, Hermes (Italian author)

    Hermeticism: …La poesia ermetica (1936), after Hermes Trismegistos, reputed author of occult symbolic works and inventor of a magical airtight seal.

  • Trismosin, Salomen (alchemist)

    alchemy: Latin alchemy: SalomonTrismosin, purported author of the Splendor solis, or “Splendour of the Sun” (published 1598), engaged in extensive visits to alchemical adepts (a common practice) and claimed success through “kabbalistic and magical books in the Egyptian language.” The impression given is that many had the secret…

  • trismus (pathology)

    tetanus: …stiffness of the jaw, or trismus. The muscles of the mouth are often affected, pulling the lips out and up over the teeth into a grimace, the mixture of smile and snarl that heralds the onset of the generalized convulsive stage of tetanus. Spasm of the muscles of the throat…

  • trisomy (genetics)

    chromosomal disorder: …pairs may be duplicated (trisomy) or absent (monosomy); an entire set of 23 chromosome pairs can be duplicated three (triploidy) or more (polyploidy) times; or one arm or part of one arm of a single chromosome may be missing (deletion). Part of one chromosome may be transferred to another…

  • trisomy 13 (pathology)

    Trisomy 13, human chromosomal disorder that results from an extra (third) copy of chromosome 13. Infants born with this disorder have profound mental retardation and severe developmental malformations that include a small head, a cleft palate and lip, tiny eyes and eye openings, extra digits on h

  • trisomy 18 (pathology)

    Trisomy 18, human chromosomal disorder that results from an extra (third) copy of chromosome 18. Infants born with this disorder are smaller than average and usually do not survive longer than a few months. Characteristics of the syndrome include severe mental and growth retardation; congenital

  • trisomy 21 (pathology)

    Down syndrome: …21, a condition known as trisomy 21. British physician John Langdon Down first described the physical features of Down syndrome in 1866, and thus the disorder was later named for him.

  • trisomy X (genetics)

    X-trisomy, sex chromosome disorder of human females, in which three X chromosomes are present, rather than the normal pair. More common than Turner’s syndrome, where only one X chromosome is present, X-trisomy usually remains undetected because affected individuals appear normal, experience

  • Trisopterus luscus (fish)

    Bib, common fish of the cod family, Gadidae, found in the sea along European coastlines. The bib is a rather deep-bodied fish with a chin barbel, three close-set dorsal fins, and two close-set anal fins. It usually grows no longer than about 30 cm (12 inches) and is copper red with darker bars.

  • trisporic acid (pheromone)

    fungus: Sexual pheromones: …interplay between mating types produces trisporic acid, a pheromone that induces the formation of specialized aerial hyphae. Volatile intermediates in the trisporic acid synthetic pathway are interchanged between the tips of opposite mating aerial hyphae, causing the hyphae to grow toward each other and fuse together. In yeasts belonging to…

  • Trissino, Gian Giorgio (Italian writer)

    Gian Giorgio Trissino, literary theorist, philologist, dramatist, and poet, an important innovator in Italian drama. Born into a wealthy patrician family in Vicenza, a cultural centre in his time, Trissino traveled widely in Italy, studying Greek in Milan and philosophy in Ferrara and frequenting

  • Trissino, Villa (house, Cricoli, Italy)

    Andrea Palladio: Early life and works: The Villa Trissino was rebuilt to a plan reminiscent of designs of Baldassarre Peruzzi, an important High Renaissance architect. Planned to house a learned academy for Trissino’s pupils, who lived a semimonastic life studying mathematics, music, philosophy, and classical authors, the villa represented Trissino’s interpretation of…

  • Trist, N. P. (United States official)

    Mexican-American War: Treaty of Guadalupe Hidalgo and the war’s legacy: Polk had assigned Nicholas Trist, chief clerk in the State Department, to accompany Scott’s forces and to negotiate a peace treaty. But after a long delay in the formation of a new Mexican government capable of negotiations, Polk grew impatient and recalled Trist. Trist, however, disobeyed his instructions…

  • Trist, Nicholas (United States official)

    Mexican-American War: Treaty of Guadalupe Hidalgo and the war’s legacy: Polk had assigned Nicholas Trist, chief clerk in the State Department, to accompany Scott’s forces and to negotiate a peace treaty. But after a long delay in the formation of a new Mexican government capable of negotiations, Polk grew impatient and recalled Trist. Trist, however, disobeyed his instructions…

  • Tristan (medieval prose work)

    romance: Arthurian themes: A 13th-century prose Tristan (Tristan de Léonois), fundamentally an adaptation of the Tristan story to an Arthurian setting, complicates the love theme of the original with the theme of a love rivalry between Tristan and the converted Saracen Palamède and represents the action as a conflict between the…

  • Tristan (work by Mann)

    Tristan, novella by Thomas Mann, published in 1903 as one of six novellas in Tristan: Sechs Novellen. The plot concerns three individuals: Anton Kl?terjahn, a prosperous, unimaginative businessman from northern Germany; his tubercular wife, Gabriele; and Detlev Spinell, an effete, eccentric writer.

  • Tristan and Iseult (legendary figures)

    Tristan and Isolde, principal characters of a famous medieval love-romance, based on a Celtic legend (itself based on an actual Pictish king). Though the archetypal poem from which all extant forms of the legend are derived has not been preserved, a comparison of the early versions yields an idea

  • Tristan and Isolde (legendary figures)

    Tristan and Isolde, principal characters of a famous medieval love-romance, based on a Celtic legend (itself based on an actual Pictish king). Though the archetypal poem from which all extant forms of the legend are derived has not been preserved, a comparison of the early versions yields an idea

  • Tristan and Isolt (legendary figures)

    Tristan and Isolde, principal characters of a famous medieval love-romance, based on a Celtic legend (itself based on an actual Pictish king). Though the archetypal poem from which all extant forms of the legend are derived has not been preserved, a comparison of the early versions yields an idea

  • Tristan and Yseult (legendary figures)

    Tristan and Isolde, principal characters of a famous medieval love-romance, based on a Celtic legend (itself based on an actual Pictish king). Though the archetypal poem from which all extant forms of the legend are derived has not been preserved, a comparison of the early versions yields an idea

  • Tristan da Cunha (island group, Atlantic Ocean)

    Tristan da Cunha, island and group of islands in the South Atlantic Ocean, about midway between southern Africa and South America. The island group is a constituent part of the British overseas territory of St. Helena, Ascension and Tristan da Cunha. The six small islands of the Tristan da Cunha

  • Tristan da Cunha (island, Atlantic Ocean)

    Tristan da Cunha: Five of them—Tristan da Cunha, Inaccessible, Nightingale, Middle, and Stoltenhoff—are located within 25 miles (40 km) of one another, and the sixth, Gough, lies about 200 miles (320 km) south-southeast of the group. The territory is located approximately 1,300 miles (2,100 km) to the south of St.…

  • Tristán de Escamilla, Luis (Spanish painter)

    Luis Tristán, Spanish painter who was in the vanguard of early Baroque painting in Spain. A student of El Greco from 1603 to 1607, Tristán came under the influence of another El Greco pupil, Orazio Borgianni. Tristán occasionally borrowed from the works of El Greco, as can be seen in his portrait

  • Tristan de Léonois (medieval prose work)

    romance: Arthurian themes: A 13th-century prose Tristan (Tristan de Léonois), fundamentally an adaptation of the Tristan story to an Arthurian setting, complicates the love theme of the original with the theme of a love rivalry between Tristan and the converted Saracen Palamède and represents the action as a conflict between the…

  • Tristan diving petrel (bird)

    diving petrel: …and most widespread is the common diving petrel (Pelecanoides urinatrix), about 16 cm (6.5 inches) long; the largest is the Peruvian diving petrel (P. garnotii), about 25 cm long, restricted to the west coast of South America from about 6° to 37° S.

  • Tristan l’Hermite (French author)

    Tristan l’Hermite, dramatist and poet, one of the creators of French classical drama. Long overshadowed by his contemporary Pierre Corneille, he was rediscovered in the late 19th century and continues to excite scholarly and critical interest. At the age of 11, Tristan was attached as page to the

  • Tristan und Isolde (work by Immermann)

    Karl Leberecht Immermann: …found expression in his epic Tristan und Isolde, which was left unfinished at his death.

  • Tristan und Isolde (romance by Gottfried von Strassburg)

    Gottfried von Strassburg: …German poets, whose courtly epic Tristan und Isolde is the classic version of this famous love story.

  • Tristan und Isolde (opera by Wagner)

    counterpoint: The Romantic period: In Tristan und Isolde Wagner set the leitmotifs in counterpoint against one another. Similarly, in the Prelude to Act III of Siegfried, a motive known as the “Need of the Gods” is cast against one associated with the “Valkyries.”

  • Tristán, Luis (Spanish painter)

    Luis Tristán, Spanish painter who was in the vanguard of early Baroque painting in Spain. A student of El Greco from 1603 to 1607, Tristán came under the influence of another El Greco pupil, Orazio Borgianni. Tristán occasionally borrowed from the works of El Greco, as can be seen in his portrait

  • Tristan: Sechs Novellen (work by Mann)

    Tristan, novella by Thomas Mann, published in 1903 as one of six novellas in Tristan: Sechs Novellen. The plot concerns three individuals: Anton Kl?terjahn, a prosperous, unimaginative businessman from northern Germany; his tubercular wife, Gabriele; and Detlev Spinell, an effete, eccentric writer.

  • Tristana (film by Bu?uel [1970])

    Luis Bu?uel: Life and work: His later French films—including Tristana (1970), again starring Deneuve; Le Charme discret de la bourgeoisie (1972; The Discreet Charm of the Bourgeoisie); and Cet obscur objet du désir (1977; That Obscure Object of Desire)—all trade in Bu?uel’s first and only real belief system, surrealism. In this world, society rests…

  • Tristania conferta (tree)

    Brisbane box, (Tristania conferta), evergreen tree, of the family Myrtaceae, native to Australia and commonly cultivated in tropical and subtropical regions of North America as a shade tree. It grows to more than 45 metres (about 150 feet) tall, and it has oval or lance-shaped leaves 7–15

  • Tristano, Lennie (American musician)

    Lennie Tristano, American jazz pianist, a major figure of cool jazz and an influential teacher. Tristano, who became totally blind as a child, began playing piano in taverns at age 12. He grew up in Chicago, where he studied at the American Conservatory of Music (B.Mus, 1943) and was a noted

  • Tristano, Leonard Joseph (American musician)

    Lennie Tristano, American jazz pianist, a major figure of cool jazz and an influential teacher. Tristano, who became totally blind as a child, began playing piano in taverns at age 12. He grew up in Chicago, where he studied at the American Conservatory of Music (B.Mus, 1943) and was a noted

  • Tristes tropiques (work by Lévi-Strauss)

    Claude Lévi-Strauss: …recognition with Tristes tropiques (1955; A World on the Wane), a literary intellectual autobiography. Other publications include Anthropologie structurale (rev. ed., 1961; Structural Anthropology), La Pensée sauvage (1962; The Savage Mind), and Le Totémisme aujourd’hui (1962; Totemism). His massive Mythologiques appeared in four volumes: Le Cru et le cuit (1964;…

  • tristeza (plant disease)

    plant disease: Biological control: …with an attenuated strain of tristeza virus, which effectively controls the virulent strain that causes the disease. An avirulent strain of Agrobacterium radiobacter (K84) can be applied to plant wounds to prevent crown gall caused by infection with Agrobacterium tumefaciens. Many more specific antagonists are being investigated and hold much…

  • Tristia (work by Ovid)

    Ovid: Works: The Tristia and Epistulae ex Ponto were written and sent to Rome at the rate of about a book a year from 9 ce on. They consist of letters to the emperor and to Ovid’s wife and friends describing his miseries and appealing for clemency. For…

  • tristimulus system (colour)

    Tristimulus system, a system for visually matching a colour under standardized conditions against the three primary colours—red, green, and blue; the three results are expressed as X, Y, and Z, respectively, and are called tristimulus values. For example, the tristimulus values of the emerald-green

  • tristimulus value (colour)

    tristimulus system: …Z, respectively, and are called tristimulus values.

  • Tristram and Isolde (legendary figures)

    Tristan and Isolde, principal characters of a famous medieval love-romance, based on a Celtic legend (itself based on an actual Pictish king). Though the archetypal poem from which all extant forms of the legend are derived has not been preserved, a comparison of the early versions yields an idea

  • Tristram and Isolt (legendary figures)

    Tristan and Isolde, principal characters of a famous medieval love-romance, based on a Celtic legend (itself based on an actual Pictish king). Though the archetypal poem from which all extant forms of the legend are derived has not been preserved, a comparison of the early versions yields an idea

  • Tristram Shandy (novel by Sterne)

    Tristram Shandy, experimental novel by Laurence Sterne, published in nine volumes from 1759 to 1767. Wildly experimental for its time, Tristram Shandy seems almost a modern avant-garde novel. Narrated by Shandy, the story begins at the moment of his conception and diverts into endless digressions,

  • Tristrams saga (Icelandic saga)

    Icelandic literature: Romances: …earliest romance was probably the Tristrams saga (1226), derived from a late 12th-century adaptation of the Tristan and Isolde legend by the Anglo-Norman poet Thomas. This was followed by the Karlamagnús saga (“Saga of Charlemagne”), a collection of prose renderings of French chansons de geste, including a Norse version of…

  • Tristrem and Iseult (legendary figures)

    Tristan and Isolde, principal characters of a famous medieval love-romance, based on a Celtic legend (itself based on an actual Pictish king). Though the archetypal poem from which all extant forms of the legend are derived has not been preserved, a comparison of the early versions yields an idea

  • Tristrem and Isolde (legendary figures)

    Tristan and Isolde, principal characters of a famous medieval love-romance, based on a Celtic legend (itself based on an actual Pictish king). Though the archetypal poem from which all extant forms of the legend are derived has not been preserved, a comparison of the early versions yields an idea

  • trisvabhava (Buddhism)

    Trisvabhava, (Sanskrit: “three forms of existence”) in Buddhism, the states of the real existence that appear to a person according to his stage of understanding. Together with the doctrine of storehouse consciousness (alaya-vijnana), it constitutes the basic theory of the Vijnanavada

  • trisyllabic rhyme (linguistics)

    rhyme: …rhyme (profession / discretion), and trisyllabic rhyme, in which three syllables rhyme (patinate / latinate). The too-regular effect of masculine rhyme is sometimes softened by using trailing rhyme, or semirhyme, in which one of the two words trails an additional unstressed syllable behind it (trail / failure). Other types of…

  • tritagonist (theatre)

    protagonist: …added a third actor, the tritagonist, and was able to write more complex, more natural dialogue. That there were only three actors did not limit the number of characters to three because one actor would play more than one character.

  • tritanomaly (physiology)

    colour blindness: Types of colour blindness: …blue cones are absent; and tritanomaly (reduced sensitivity to blue), which arises from the abnormal function of blue cones.

  • tritanopia (physiology)

    colour blindness: Types of colour blindness: …blue-yellow colour blindness are known: tritanopia (blindness to blue, usually with the inability to distinguish between blue and yellow), which occurs when blue cones are absent; and tritanomaly (reduced sensitivity to blue), which arises from the abnormal function of blue cones.

  • triterpene (chemical compound)

    isoprenoid: Triterpenes: The acyclic triterpene hydrocarbon squalene constitutes more than half of the liver oil of certain species of sharks and is otherwise rather widely distributed in nature. It has been found in other fish liver oils, in vegetable oils, in fungi, and in human earwax…

  • Trithelodontidae (fossil tetrapod family)

    cynodont: Tritylodontidae, Chiniquodontidae, and Trithelodontidae. The first mammals probably derived from small carnivorous chiniquodontids or trithelodonts sometime in the Middle Triassic Epoch (245.9 million to 228.7 million years ago).

  • Trithuria (plant genus)

    Nymphaeales: The sole genus, Trithuria, has a dozen species native to India, New Zealand, and Australia. They are clumped, grasslike aquatic herbs that may be submerged, with tiny flowers aggregated into stalked headlike clusters. Four of the species are dioecious (separate male and female plants), and the others have…

  • triticale (plant)

    Triticale, wheat-rye hybrid that has a high yield and rich protein content. The first cross was reported in 1875 and the first fertile cross in 1888. The name triticale first appeared in scientific literature in 1935 and is attributed to Erich Tschermak von Seysenegg. In favourable environmental

  • Triticum (plant)

    Wheat, any of several species of cereal grasses of the genus Triticum (family Poaceae) and their edible grains. Wheat is one of the oldest and most important of the cereal crops. Of the thousands of varieties known, the most important are common wheat (Triticum aestivum), used to make bread; durum

  • Triticum aestivum (plant)

    Poaceae: Economic and ecological importance: The development of bread wheat (T. aestivum), a hexaploid wheat, involved the hybridization of a tetraploid wheat with A. tauschii, a closely allied diploid species of grass, followed by chromosome doubling to 42.

  • Triticum aestivum spelta (plant)

    Spelt, (Triticum spelta), species of wheat (family Poaceae) grown for livestock forage and used in baked goods and cereals. Although spelt has an ancient history and was once an important crop in Europe during the Middle Ages, it has been largely supplanted by common wheat (Triticum aestivum).

  • Triticum compactum (plant)

    wheat: …as spaghetti and macaroni; and club wheat (T. compactum), a softer type, used for cake, crackers, cookies, pastries, and flours. Additionally, some wheat is used by industry for the production of starch, paste, malt, dextrose, gluten, alcohol, and other products.

  • Triticum dicoccon (plant)

    Poaceae: Economic and ecological importance: In one of these, emmer wheat (T. dicoccon), the grain is tightly clasped by the hull (lemma and palea), a characteristic of wild species that depend on the hull for dispersal. Threshing and winnowing—the separation of chaff from grain—is far easier when the hull separates freely from the grain,…

  • Triticum durum (cereal)

    Durum wheat, (species Triticum durum), hard wheat (q.v.) producing a glutenous flour. The purified middlings of durum wheat are known as semolina, used for pasta

  • Triticum monococcum (plant)

    Poaceae: Economic and ecological importance: …a domesticated diploid wheat is einkorn wheat (Triticum monococcum), one of the earliest domesticated wheat species. Hybridization of a diploid wheat with Aegilops speltoides (a closely allied species of grass), followed by doubling of the chromosome complement, produced tetraploid wheats. In one of these, emmer wheat (T. dicoccon), the grain…

  • Triticum vulgare (plant)

    Poaceae: Economic and ecological importance: The development of bread wheat (T. aestivum), a hexaploid wheat, involved the hybridization of a tetraploid wheat with A. tauschii, a closely allied diploid species of grass, followed by chromosome doubling to 42.

  • tritium (chemical isotope)

    Tritium, (T, or 3H), the isotope of hydrogen with atomic weight of approximately 3. Its nucleus, consisting of one proton and two neutrons, has triple the mass of the nucleus of ordinary hydrogen. Tritium is a radioactive species having a half-life of 12.32 years; it occurs in natural water with an

  • Trito-Zechariah (biblical literature)

    Book of Zechariah: Deutero- and Trito-Zechariah, each of which has an introduction setting it apart from the rest (9:1 and 12:1), are separate collections of sayings usually dated to the 4th and 3rd centuries bc, respectively. They further develop Zechariah’s eschatological themes and provide many images of a messianic figure…

  • tritocerebrum (animal anatomy)

    nervous system: Arthropods: the protocerebrum, deutocerebrum, and tritocerebrum. The anterior protocerebrum, which receives the nerves of the eyes and other organs, contains centres, or neuropils, such as the optic centres and bodies known as corpora pedunculata. The neuropils function as integrative systems for the anterior sense organs, especially the eyes, and in…

  • Triton (Greek mythology)

    Triton, in Greek mythology, a merman, demigod of the sea; he was the son of the sea god, Poseidon, and his wife, Amphitrite. According to the Greek poet Hesiod, Triton dwelt with his parents in a golden palace in the depths of the sea. Sometimes he was not particularized but was one of many

  • Triton (submarine)

    Triton, U.S. nuclear-powered submarine that was the first vessel to circumnavigate the globe underwater. The Triton completed its circumnavigation on its maiden voyage, officially beginning the mission in the mid-Atlantic on Feb. 24, 1960. It proceeded west around Cape Horn, crossed the Pacific and

  • Triton (fountain by Bernini)

    Western sculpture: Early and High Baroque: …work, the fountain of the Triton in the Piazza Barberini, Rome, from which all clarity of profile or of shadow, all definiteness of plane, are removed, is also characteristic of Bernini’s style, widely imitated throughout Europe.

  • Triton (missile)

    rocket and missile system: Matador and other programs: Another project, the Triton, was similarly bypassed due to design difficulties and lack of funding. The Triton was to have had a range of 12,000 miles and a payload of 1,500 pounds. Radar map-matching guidance was to have given it a CEP of 1,800 feet.

  • triton (tritium nucleus)

    Triton, nucleus of the heaviest hydrogen isotope, tritium, or hydrogen-3. Tritons, which consist of one proton and two neutrons, result from certain nuclear reactions. The collision of a deuteron with another deuteron, for example, sometimes produces a proton and a triton. See also

  • Triton (novel by Delany)

    Samuel R. Delany: In Triton (1976), in which the main character undergoes a gender-reassignment operation, Delany examines bias against women and homosexuals. Delany’s Nèver?on series (Tales of Nevèr?on [1979]; Neveryóna; or, The Tale of Signs and Cities [1983]; Flight from Nevèr?on [1985]; and The Bridge of Lost Desire [1987])…

  • Triton (astronomy)

    Triton, largest of Neptune’s moons, whose unusual orbital characteristics suggest that it formed elsewhere in the solar system and was later captured by Neptune. It was discovered by the English astronomer William Lassell in October 1846, only a few weeks after the discovery of Neptune itself.

  • triton shell (gastropod family)

    Triton shell, any of several marine snails constituting the family Cymatiidae (subclass Prosobranchia of the class Gastropoda), in which the shell usually is spired, the body whorl is large, and the aperture in the first whorl of the shell is broadly or narrowly toothed. The triton’s shell may be

  • tritone (music)

    Tritone, in music, the interval encompassed by three consecutive whole steps, as for instance the distance from F to B (the whole steps F–G, G–A, and A–B). In semitone notation, the tritone is composed of six semitones; thus it divides the octave symmetrically in equal halves. In musical notation

  • Tritrichomonas foetus (protozoan)

    cat: Diseases and parasites: …may increase their exposure to Tritrichomonas foetus, a single-celled flagellated protozoan that resembles Giardia. T. foetus infects the cat’s lower intestine, causing diarrhea, which may also contain mucus or fresh blood in some infected cats.

  • trittico, Il (work by Puccini)

    Giacomo Puccini: Mature work and fame: …study emerged Il trittico (The Triptych; New York City, 1918), three stylistically individual one-act operas—the melodramatic Il tabarro (The Cloak), the sentimental Suor Angelica, and the comic Gianni Schicchi. His last opera, based on the fable of Turandot as told in the play Turandot by the 18th-century Italian dramatist…

  • trittyes (ancient Greek government)

    ancient Greek civilization: The reforms of Cleisthenes: …to align demes from different trittyes (tribal thirds) but the same tribe along the arterial roads leading to the city, perhaps with a view to easy tribal mobilization in the city centre. It is right that the political aspects of Cleisthenes (who was in fact far from producing democracy in…

  • trittys (ancient Greek government)

    ancient Greek civilization: The reforms of Cleisthenes: …to align demes from different trittyes (tribal thirds) but the same tribe along the arterial roads leading to the city, perhaps with a view to easy tribal mobilization in the city centre. It is right that the political aspects of Cleisthenes (who was in fact far from producing democracy in…

  • Triturus (salamander)

    Caudata: Annotated classification: …North America; 21 genera (including Triturus and Salamandra in Europe, Notophthalamus and Taricha in North America, and Cynops in Japan) and about 120 species. There is disagreement concerning the classification of

  • Tritylodon (fossil tetrapod genus)

    Tritylodont, any member of a genus (Tritylodon) of extinct cynodont therapsids (mammal relatives) found as fossils in Late Triassic and Early Jurassic rocks in southern Africa and North America. These fossils have been dated to between 208 million and 200 million years ago. Tritylodonts are

  • tritylodont (fossil tetrapod genus)

    Tritylodont, any member of a genus (Tritylodon) of extinct cynodont therapsids (mammal relatives) found as fossils in Late Triassic and Early Jurassic rocks in southern Africa and North America. These fossils have been dated to between 208 million and 200 million years ago. Tritylodonts are

  • Tritylodontidae (fossil tetrapod family)

    cynodont: families—Procynosuchidae, Galesauridae, Tritylodontidae, Chiniquodontidae, and Trithelodontidae. The first mammals probably derived from small carnivorous chiniquodontids or trithelodonts sometime in the Middle Triassic Epoch (245.9 million to 228.7 million years ago).

  • TRIUMF (national laboratory, Vancouver, British Columbia, Canada)

    particle accelerator: Sector-focused cyclotrons: …world’s largest cyclotron, at the TRIUMF laboratory in Vancouver, B.C., Can., is a sector-focused machine. Its magnet, which weighs 4,000 metric tons and is 18 metres (59 feet) in diameter, is divided into six equal sectors arranged like a “pinwheel.” Its maximum energy is 520 MeV, and it is used…

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