- Typhoon Nina–Banqiao dam failure (Chinese history [1975])
Typhoon Nina–Banqiao dam failure, catastrophic dam failure in August 1975 in western Henan province, China, caused by a typhoon (tropical cyclone). The ensuing floods caused more than 150,000 casualties, making it one of the deadliest typhoon disasters in history. The Banqiao Dam had been built on
- Typhoon No. 15 (storm)
Toya Maru ferry disaster: The typhoon (known as “No. 15” in Japan and named “Marie” in the West) had been moving northeastward through the Sea of Japan (East Sea; along Japan’s western coast) at speeds exceeding 40 miles (65 km) per hour and struck northern Honshu and southern Hokkaido (which are separated by…
- Typhoon Tino (tropical cyclone [2025])
Typhoon Kalmaegi, late-season tropical cyclone whose strong winds and heavy rains brought widespread damage to several islands in the central Philippines, as well as to Vietnam and Thailand. The typhoon’s maximum sustained wind speed was measured at 114 miles (183 km) per hour, with peak gusts
- Typhoon Tip (storm [1979])
Typhoon Tip, storm that developed in the northwestern Pacific Ocean in October 1979 and the largest tropical cyclone ever observed, with a diameter of roughly 1,380 miles (2,220 km). At its peak, winds reached a speed of 190 miles (306 km) per hour, and the storm had the lowest sea-level pressure
- Typhoon Uwan (storm [2025])
Super Typhoon Fung-wong, late-season tropical cyclone that grew into a super typhoon in November 2025 and caused severe damage in the Philippines. The typhoon’s maximum sustained wind speed was about 115 miles (185 km) per hour in its early track as it approached the Philippines, along with peak
- Typhoon Yolanda (storm, northern Pacific Ocean [2013])
Super Typhoon Haiyan, massive and highly destructive storm in the North Pacific Ocean that affected Palau, the Philippines, Vietnam, and China during early November 2013. The tropical cyclone produced high winds, coastal storm surges, heavy rains, and flooding in the land areas over which it
- typhula blight (plant pathology)
snow mold: Gray snow mold, or typhula blight, is caused by Typhula incarnata, T. ishikariensis and T. idahoensis. It produces roughly circular bleached-tan areas up to about 60 cm in diameter. When moist, these patches are covered with a fluffy bluish gray to almost black mycelium. Minute…
- Typhula idahoensis (fungus)
snow mold: ishikariensis and T. idahoensis. It produces roughly circular bleached-tan areas up to about 60 cm in diameter. When moist, these patches are covered with a fluffy bluish gray to almost black mycelium. Minute round brown dots (sclerotia) form on diseased plant parts.
- Typhula incarnata (fungus)
snow mold: …typhula blight, is caused by Typhula incarnata, T. ishikariensis and T. idahoensis. It produces roughly circular bleached-tan areas up to about 60 cm in diameter. When moist, these patches are covered with a fluffy bluish gray to almost black mycelium. Minute round brown dots (sclerotia) form on diseased plant parts.
- Typhula ishikariensis (fungus)
snow mold: …is caused by Typhula incarnata, T. ishikariensis and T. idahoensis. It produces roughly circular bleached-tan areas up to about 60 cm in diameter. When moist, these patches are covered with a fluffy bluish gray to almost black mycelium. Minute round brown dots (sclerotia) form on diseased plant parts.
- typhus (disease)
typhus, series of acute infectious diseases that appear with a sudden onset of headache, chills, fever, and general pains, proceed on the third to fifth day with a rash and toxemia (toxic substances in the blood), and terminate after two to three weeks. Typhus (actually not one illness but a group
- typical badger (mammal)
badger: The European badger (Meles meles) is omnivorous, consuming earthworms, insects, small mammals, birds and their eggs, and also fruits and nuts. It is grayish, with large black-and-white facial stripes. It is 30 cm tall and 56–81 cm long, excluding the 12–20-cm tail, and weighs 8–10 kg…
- typical flycatcher (bird)
tyrant flycatcher: Like the Old World flycatchers of the family Muscicapidae, the fly-catching tyrannids dart from a perch to seize insects on the wing. The bills of such forms of flycatcher are broad, flattened, and slightly hooked, with bristles at the base that appear to serve as aids in…
- typical heron (bird)
heron: Herons are subdivided into typical herons, night herons, and tiger herons. Typical herons feed during the day. In breeding season some develop showy plumes on the back and participate in elaborate mutual-courtship posturing. Best known of the typical herons are the very large, long-legged and long-necked, plain-hued, crested members…
- Typicon (monastic rule)
St. Athanasius the Athonite: There, he introduced a Typicon, or rule, for cenobites (monks in community life) based on similar codes by the 4th-century monastic founder Basil of Caesarea and the 9th-century reformer Theodore Studites.
- Typographic Man, R.I.P.
Said Charles V, But in which language does one speak to a machine, and what can be expected by way of a response? And if our languages these days are for the most part being made by and for machines, how and where do we find the words with which to conceive a politics or a future fit for human
- typographic printing
letterpress printing, in commercial printing, process by which many copies of an image are produced by repeated direct impression of an inked, raised surface against sheets or a continuous roll of paper. Letterpress is the oldest of the traditional printing techniques and remained the only
- typography
typography, the design, or selection, of letter forms to be organized into words and sentences to be disposed in blocks of type as printing upon a page. Typography and the typographer who practices it may also be concerned with other, related matters—the selection of paper, the choice of ink, the
- typological interpretation (biblical criticism)
biblical literature: Allegorical interpretation: …a species of it, is typological interpretation, in which certain persons, objects, or events in the Old Testament are seen to set forth at a deeper level persons, objects, or events in the New. In such interpretations, Noah’s Ark (Genesis 6:14–22) is interpreted to typify the church, outside which there…
- typology (system of groupings)
typology, system of groupings (such as “landed gentry” or “rain forests”), usually called types, the members of which are identified by postulating specified attributes that are mutually exclusive and collectively exhaustive—groupings set up to aid demonstration or inquiry by establishing a limited
- typophone (musical instrument)
celesta: The typophone, a similar, softer-toned instrument with graduated steel tuning forks instead of bars, is sometimes mistakenly called a celesta. It was invented by Mustel’s father, Victor, in 1865 and patented, with improvements, in 1868.
- Typos (Byzantine edict)
St. Martin I: …that condemned monothelitism and the Typos, an edict by the Byzantine emperor Constans II Pogonatus that forbade discussion of Christ’s wills. Constans, who had not approved Martin’s election, ordered the pope’s arrest in 653. Martin was taken to Constantinople in September 654, where he was publicly humiliated and tortured. In…
- Typos (printing)
typography: Typography as a useful art: …produced a third typeface called Typos.
- Tyr (town and historical site, Lebanon)
Tyre, town on the Mediterranean coast of southern Lebanon, located 12 miles (19 km) north of the modern border with Israel and 25 miles (40 km) south of Sidon (modern Ṣaydā). It was a major Phoenician seaport from about 2000 bce through the Roman period. Tyre, built on an island and on the
- Týr (Germanic deity)
Tyr, one of the oldest gods of the Germanic peoples and a somewhat enigmatic figure. He was apparently the god concerned with the formalities of war—especially treaties—and also, appropriately, of justice. It is in his character as guarantor of contracts, guardian of oaths, that the most famous
- Tyr (Germanic deity)
Tyr, one of the oldest gods of the Germanic peoples and a somewhat enigmatic figure. He was apparently the god concerned with the formalities of war—especially treaties—and also, appropriately, of justice. It is in his character as guarantor of contracts, guardian of oaths, that the most famous
- Tyra Banks Show, The (television show)
Tyra Banks: Television shows: …her own daily talk show, The Tyra Banks Show, in 2005. It focused on fashion, lifestyle, makeovers, and topical issues and featured Banks at the center of a reality-show-like twist: in taped confessional segments she divulged her own struggles with a variety of issues, including low self-esteem and her inability…
- tyramine (biochemistry)
therapeutics: Antidepressant drugs: This is especially true of tyramine, which can cause hypertension and severe headache. Tyramine is found in many foods, which forces patients who take it to adhere to a specific diet.
- Tyranni (passeriform suborder)
passeriform: Annotated classification: Suborder Tyranni Syrinx usually more complex; muscles variable; pessulus present or absent. Sternum with short spina sternalis, forked (exceptions noted below); posterior border with 1 or 2 pairs of notches. Hallux strong. Clavicles well developed. Family Xenicidae (New Zealand wrens) Small birds, 7.5 to
- tyrannicide
tyrannicide, in ancient Greece and Rome, the killer or would-be killer of a tyrant. The term may also refer to the act of killing a tyrant. Tyrannicides were often celebrated in antiquity, and some Classical states even legislated to exempt from prosecution those who killed a tyrant or would-be
- Tyrannidae (bird)
tyrant flycatcher, any of about 400 species of aggressive insect-eating New World birds of the family Tyrannidae (order Passeriformes). About one-third of the species are not flycatcher-like in habit and bear names derived from their habitats (e.g., bush tyrant, marsh tyrant) or from their
- Tyrannion (Greek scholar)
Strabo: …44 bce to study with Tyrannion, the former tutor of Cicero, and with Xenarchus, both of whom were members of the Aristotelian school of philosophy. Under the influence of Athenodorus, former tutor of Octavius, who probably introduced him into the future emperor’s circle, he turned toward Stoical philosophy, the
- Tyrannobdella rex (animal)
leech: Tyrannobdella rex, a member of the family Praobdellidae and native to remote parts of the upper Amazon River in Peru, appears to prefer the mucous membranes found in the nasal cavity of mammals. This leech seeks out its victims as they bathe, making an attachment…
- tyrannos (ancient Greece)
tyrant, a cruel and oppressive ruler or, in ancient Greece, a ruler who seized power unconstitutionally or inherited such power. In the 10th and 9th centuries bce, monarchy was the usual form of government in the Greek states. The aristocratic regimes that replaced monarchy were by the 7th century
- tyrannosaur (dinosaur group)
tyrannosaur, any of a group of predatory dinosaurs that lived from the late Jurassic Period (about 150 million years ago) to the end of the Cretaceous Period (about 65 million years ago), at which time they reached their greatest dominance. Most tyrannosaurs were large predators, with very large
- Tyrannosauridae (dinosaur group)
tyrannosaur, any of a group of predatory dinosaurs that lived from the late Jurassic Period (about 150 million years ago) to the end of the Cretaceous Period (about 65 million years ago), at which time they reached their greatest dominance. Most tyrannosaurs were large predators, with very large
- Tyrannosaurus (dinosaur genus)
dinosaur: Theropoda: …Microraptor, up to the great Tyrannosaurus and Giganotosaurus, which were 15 or more metres (50 feet) long, more than 5 metres (16 to 18 feet) tall, and weighed 6 tons or more. Theropods have been recovered from deposits of the Late Triassic through the latest Cretaceous and from all continents.
- Tyrannosaurus (dinosaur genus)
dinosaur: Theropoda: …Microraptor, up to the great Tyrannosaurus and Giganotosaurus, which were 15 or more metres (50 feet) long, more than 5 metres (16 to 18 feet) tall, and weighed 6 tons or more. Theropods have been recovered from deposits of the Late Triassic through the latest Cretaceous and from all continents.
- Tyrannosaurus mcraeensis (dinosaur)
Tyrannosaurus rex: …which the study’s authors called T. mcraeensis.
- Tyrannosaurus Rex (British rock band)
T. Rex, British rock band, a pioneer of glam rock in the 1970s. T. Rex originally was known for its acoustic, psychedelic, folk-influenced sound. From 1970, however, with reconceptualization of its direction and the addition of electronic instruments, the band broke into the glam rock scene. T. Rex
- Tyrannosaurus rex (dinosaur)
Tyrannosaurus rex, (Tyrannosaurus rex), species of predatory dinosaurs that lived during the end of the Cretaceous Period (about 66 million years ago) known from fossils found in the United States and Canada dating to between about 80 million and 66 million years ago. Tyrannosaurus rex is the
- Tyrannosaurus Rex Versus the Corduroy Kid (poetry by Armitage)
Simon Armitage: Poetry collections: …Universal Home Doctor (both 2002), Tyrannosaurus Rex Versus the Corduroy Kid (2006), Seeing Stars (2010), The Unaccompanied (2017), The Owl and the Nightingale (2021), Never Good with Horses (2023), and Blossomise (2024).
- tyrannulet (bird)
tyrannulet, any of about 50 species of birds in the tyrant flycatcher family, Tyrannidae (order Passeriformes). They are distinguished from other tyrant flycatchers by their small size and diminutive bill. The name tyrannulet is given to members of about 20 genera within the family. Fairly typical
- Tyrannus (bird)
kingbird, (genus Tyrannus), any of 13 species of birds of the family Tyrannidae noted for their pugnacity. Although only about 20 cm (8 inches) long, a kingbird will chase birds as large as a crow or a hawk; it will even ride on the larger bird’s back and peck at its head. Kingbirds are gray above
- Tyrannus Nix? (poetry by Ferlinghetti)
Lawrence Ferlinghetti: … (1961), Where Is Vietnam (1965), Tyrannus Nix? (1969), and Who Are We Now? (1976) suggest. Retrospective collections of his poems were published as Endless Life (1981) and These Are My Rivers (1995). In 1988 Ferlinghetti published a short novel, Love in the Days of Rage, about a romance during the…
- Tyrannus tyrannus (bird)
kingbird: The eastern kingbird (T. tyrannus) ranges from the east coast of the United States to eastern Washington and Oregon in the United States and British Columbia and the Northwest Territories in Canada; it is dark slate gray above and white below, with a white tail tip.…
- Tyrannus verticalis (bird)
kingbird: The western kingbird (T. verticalis), found westward from the Great Plains, is light gray above and yellow below, with whitish edges on the outermost tail feathers. Both species have a red spot (usually concealed) on the crown.
- tyranny (politics)
tyranny, in the Greco-Roman world, an autocratic form of rule in which one individual exercised power without any legal restraint. In antiquity the word tyrant was not necessarily pejorative and signified the holder of absolute political power. In its modern usage the word tyranny is usually
- Tyranowski, Jan (Polish tailor and minister)
St. John Paul II: Early life and influences: Through Jan Tyranowski, a tailor who conducted a youth ministry for the local church, Wojtyła was introduced to the teachings of St. John of the Cross, a Carmelite mystic who held that redemption could be gained through suffering and a “spirituality of abandonment.” Tyranowski’s example helped…
- tyrant (ancient Greece)
tyrant, a cruel and oppressive ruler or, in ancient Greece, a ruler who seized power unconstitutionally or inherited such power. In the 10th and 9th centuries bce, monarchy was the usual form of government in the Greek states. The aristocratic regimes that replaced monarchy were by the 7th century
- tyrant flycatcher (bird)
tyrant flycatcher, any of about 400 species of aggressive insect-eating New World birds of the family Tyrannidae (order Passeriformes). About one-third of the species are not flycatcher-like in habit and bear names derived from their habitats (e.g., bush tyrant, marsh tyrant) or from their
- Tyrant’s Novel, The (novel by Keneally)
Thomas Keneally: Boy (1995), Bettany’s Book (2000), The Tyrant’s Novel (2003), The Widow and Her Hero (2007), The Daughters of Mars (2012), and Crimes of the Father (2017). The Dickens Boy (2020) is a fictionalized account of English novelist Charles Dickens’s youngest son, who emigrated to Australia while a teenager.
- Tyrant’s Tomb, The (work by Riordan)
Rick Riordan: … (2017), The Burning Maze (2018), The Tyrant’s Tomb (2019), and The Tower of Nero (2020).
- Tyrants of Sicily (work by Phanias)
Phanias: In his Tyrants of Sicily he seems to have dealt with Western history against a pan-Hellenic background.
- Tyras (ancient Greek colony, Ukraine)
Bilhorod-Dnistrovskyy: …Miletus established the colony of Tyras on the site. It later came under the Scythians, and it was settled by Slavs in early Kievan times (9th century). After the fall of Kiev to the Tatars, Bilhorod became a republican city-state under Moldavian princes, and the Genoese established their trading station…
- Tyrconnell (county, Ireland)
Donegal, most northerly county of Ireland, in the historic province of Ulster. The small village of Lifford in eastern Donegal is the county seat. Donegal is bounded on the west and north by the Atlantic Ocean, on the east by Lough (lake) Foyle and Northern Ireland, and on the south by Northern
- Tyrconnell, Richard Talbot, earl of (Irish Jacobite)
Richard Talbot, earl of Tyrconnell was an Irish Jacobite, a leader in the war (1689–91) waged by Irish Roman Catholics against the Protestant king William III of England. The son of Sir William Talbot, a Roman Catholic lawyer and politician, Richard fought with the royalist forces in Ireland during
- Tyrconnell, Richard Talbot, earl of, Viscount Baltinglass, baron of Talbotstown (Irish Jacobite)
Richard Talbot, earl of Tyrconnell was an Irish Jacobite, a leader in the war (1689–91) waged by Irish Roman Catholics against the Protestant king William III of England. The son of Sir William Talbot, a Roman Catholic lawyer and politician, Richard fought with the royalist forces in Ireland during
- Tyrconnell, Rory O’Donnell, 1st earl of, baron of Donegall (Irish chieftain)
Rory O’Donnell, 1st earl of Tyrconnell was an Irish chieftain who rebelled against the English and died in exile. The second son of Sir Aodh O’Donnell, lord of Tyrconnell, he allied with his elder brother Hugh Roe O’Donnell, who transferred his authority as chief to Rory upon leaving for Spain. In
- Tyrconnell, Rory O’Donnell, 1st earl of, baron of Donegall (Irish chieftain)
Rory O’Donnell, 1st earl of Tyrconnell was an Irish chieftain who rebelled against the English and died in exile. The second son of Sir Aodh O’Donnell, lord of Tyrconnell, he allied with his elder brother Hugh Roe O’Donnell, who transferred his authority as chief to Rory upon leaving for Spain. In
- tyre (wheel component)
tire, a continuous band that encircles the rim of a wheel and forms a tread that rolls on either a road, a prepared track, or the ground. There are two main types of tires, those made of metal and those made of rubber. Railroad cars, which run on smooth steel rails, use iron or steel tires for low
- Tyre (town and historical site, Lebanon)
Tyre, town on the Mediterranean coast of southern Lebanon, located 12 miles (19 km) north of the modern border with Israel and 25 miles (40 km) south of Sidon (modern Ṣaydā). It was a major Phoenician seaport from about 2000 bce through the Roman period. Tyre, built on an island and on the
- Tyri, Lake (lake, Norway)
Lake Tyri, lake, southeastern Norway, in the Ringerike region. Irregular in shape, it ranges up to 20 miles (32 km) in length and 10 miles in width, attains a maximum depth of 922 feet (281 metres), and has an area of 52 square miles (134 square km). The Begna (river) flows southward into the lake,
- Tyrian Baal (Phoenician deity)
Melqart, Phoenician god, chief deity of Tyre and of two of its colonies, Carthage and Gadir (Cádiz, Spain). He was also called the Tyrian Baal. Under the name Malku he was equated with the Babylonian Nergal, god of the underworld and death, and thus may have been related to the god Mot of Ras
- Tyrian purple (chemical compound)
Tyrian purple, naturally occurring dye highly valued in antiquity. It is closely related to indigo
- Tyrifjorden (lake, Norway)
Lake Tyri, lake, southeastern Norway, in the Ringerike region. Irregular in shape, it ranges up to 20 miles (32 km) in length and 10 miles in width, attains a maximum depth of 922 feet (281 metres), and has an area of 52 square miles (134 square km). The Begna (river) flows southward into the lake,
- Tyrnau (Slovakia)
Trnava, town, southwestern Slovakia, on the Trnava River and the main Bratislava-Žilina railway. Founded in the 7th century, Trnava received civic privileges in 1238. Its position north of the limit of Ottoman conquest in the 16th century was important to both Hungarian and Slovak cultural
- Tyrnau, Peace of (1615, Austria)
Austria: Rudolf II and Matthias: In the Peace of Tyrnau (1615) the emperor had to recognize Bethlen as prince of Transylvania, and, in the same year, he extended the truce with the Turks for another 25 years. In the meantime, war had broken out with Venice (1615–17) because of the pirating activities…
- tyrocidin (drug)
antibiotic: The first antibiotics: …early discoveries were gramicidin and tyrocidin, which are produced by bacteria of the genus Bacillus. Discovered in 1939 by French-born American microbiologist René Dubos, they were valuable in treating superficial infections but were too toxic for internal use.
- Tyrol (work by Marc)
Franz Marc: …animal life; an example is Tyrol (1914), a work that approaches abstraction. Marc joined the German army in 1914; he was killed in combat two years later.
- Tyrol (state, Austria)
Tirol, Bundesland (federal state), western Austria, consisting of North Tirol (Nordtirol) and East Tirol (Osttirol). It is bounded by Germany on the north, by Bundesländer Salzburg and Kärnten (Carinthia) on the east, by Vorarlberg on the west, and by Italy on the south. Tirol (area 4,883 square
- Tyrolean Shepherd and Swiss Milkmaid, The (circus routine by Ducrow)
circus: Equestrian acts: In “The Tyrolean Shepherd and Swiss Milkmaid,” for example, he was joined by his wife, Louisa Woolford; while standing on the backs of their circling horses, the two performed the pursuit and wooing of a “fair peasant,” complete with a lovers’ quarrel and reconciliation scene, followed…
- Tyrone (former county, Northern Ireland, United Kingdom)
Tyrone, former (until 1973) county, Northern Ireland. It was bounded by the former counties of Londonderry (north) and Fermanagh and Monaghan (south) and by former County Armagh and Lough (lake) Neagh (east). It had an area of 1,260 square miles (3,263 square km). In the north, the Sperrin
- Tyrone family (fictional characters)
Tyrone family, doomed fictional family, the four protagonists of the starkly autobiographical drama Long Day’s Journey into Night (produced posthumously 1956) by Eugene O’Neill. The play concerns a father (James), mother (Mary), and two sons (Jamie and Edmund), all based closely on O’Neill’s own
- Tyrone Guthrie Theater (theater, Minneapolis, Minnesota, United States)
Sir Tyrone Guthrie: The Tyrone Guthrie Theater (1963) in Minneapolis, Minn., modeled after the Stratford Theatre, adopted a thrust stage and followed Guthrie’s tenets for creating effective drama as outlined in his two major publications, Theatre Prospect (1932) and A Life in the Theatre (1959).
- Tyrone Rebellion (Irish history)
Ireland: The Tyrone rebellion: The origins of the third rebellion, the O’Neill (Tyrone) war, remain in doubt. Both Hugh Roe O’Donnell and Hugh O’Neill (younger son of Feardorchadh), for whom the earldom of Tyrone had been revived in 1585 and who had been elected O’Neill on Turlough…
- Tyrone, Conn O’Neill, 1st Earl of (Irish leader)
Conn O’Neill, 1st earl of Tyrone was the first of the O’Neills to emerge as leaders of the native Irish as a result of England’s attempts to subjugate the country in the 16th century. Conn, who was related through his mother to the Earl of Kildare (Fitzgerald), became chief of the Tyrone branch of
- Tyrone, Hugh O’Neill, 2nd earl of (Irish rebel)
Hugh O’Neill, 2nd earl of Tyrone was an Irish rebel who, from 1595 to 1603, led an unsuccessful Roman Catholic uprising against English rule in Ireland. The defeat of O’Neill and the conquest of his province of Ulster was the final step in the subjugation of Ireland by the English. Although born
- tyrosinase (enzyme)
transition metal: Biological functions of transition metals: …in a 1:1 ratio; (3) tyrosinases, which catalyze the formation of melanin (brownish-black pigments occurring in hair, skin, and retina of higher animals) and were the first enzymes in which copper was shown to be essential to function.
- tyrosine (chemical compound)
tyrosine, an amino acid comprising about 1 to 6 percent by weight of the mixture obtained by hydrolysis of most proteins. First isolated from casein in 1846 by German chemist Justus, baron von Liebig, tyrosine is particularly abundant in insulin (a hormone) and papain (an enzyme found in fruit of
- tyrosine kinase domain (biology)
multiple endocrine neoplasia: MEN2: …signaling region called a tyrosine kinase domain. The kinase domain is fundamental in activating cell signaling cascades. Kinase activity causes the transfer of high-energy phosphate molecules to tyrosine residues on nearby proteins, resulting in protein activation and initiation of downstream signaling events. These signaling events culminate in specific cellular functions,…
- tyrosinemia (pathology)
tyrosinemia, inherited inability of the body to metabolize normally the amino acid tyrosine. In the normal metabolic pathway of tyrosine, para-(p-)hydroxyphenylpyruvic acid is converted to homogentisic acid (in the liver) by a specific organic catalyst or enzyme, called p-hydroxyphenylpyruvic acid
- tyrosinosis (pathology)
tyrosinemia, inherited inability of the body to metabolize normally the amino acid tyrosine. In the normal metabolic pathway of tyrosine, para-(p-)hydroxyphenylpyruvic acid is converted to homogentisic acid (in the liver) by a specific organic catalyst or enzyme, called p-hydroxyphenylpyruvic acid
- tyrothricin (antibiotic)
René Dubos: …antibacterial substance and named it tyrothricin. This substance, which he was able to chemically analyze, became the first antibiotic to be commercially manufactured, though it soon proved too toxic for large-scale use. Dubos’s researches and techniques stimulated interest in penicillin and led Selman Waksman, Albert Schatz, and Elizabeth Bugie to…
- Tyrrell Downs (Victoria, Australia)
Sea Lake, town, Mallee district, northwest Victoria, Australia, located about 6 miles (10 km) south of Lake Tyrrell (a salt-encrusted depression). The first person of European descent to encounter the area around present-day Sea Lake is believed to have been William Edward Stanbridge, who arrived
- Tyrrell Museum of Palaeontology (museum, Drumheller, Alberta, Canada)
Alberta: Cultural institutions: …history and art, and the Royal Tyrrell Museum of Palaeontology in Drumheller is one of the world’s largest fossil museums, with particularly fine displays of dinosaurs. The latter institution operates in association with Dinosaur Provincial Park near Brooks, the first place to be designated a World Heritage site for its…
- Tyrrell, George (Irish theologian)
George Tyrrell was an Irish-born British Jesuit priest and philosopher. He was a prominent member of the Modernist movement, which sought to reinterpret traditional Roman Catholic teaching in the light of contemporary knowledge. Tyrrell was raised in the Anglican church but converted to Roman
- Tyrrell, James (Canadian geologist)
Thelon River: Tyrrell and his brother James explored the river and its main tributaries, the Dubawnt and Kazan rivers, in 1893–98. The vast tundra region, inhabited by a dispersed Inuit population and drained by the Thelon, is served by the trading posts of Baker Lake (Qamanittuaq; known for its Inuit tapestry)…
- Tyrrell, Joseph B. (Canadian geologist)
Thelon River: The Canadian geologist Joseph B. Tyrrell and his brother James explored the river and its main tributaries, the Dubawnt and Kazan rivers, in 1893–98. The vast tundra region, inhabited by a dispersed Inuit population and drained by the Thelon, is served by the trading posts of Baker Lake…
- Tyrrell, Lake (lake, Victoria, Australia)
Lake Tyrrell, shallow salt-crusted depression of 70 square miles (180 square km) in the Mallee district, northwestern Victoria, Austl. It lies 195 miles (314 km) northwest of Melbourne. It is the largest inland saltwater lake in Victoria and the most inland breeding ground for Australia’s seagulls.
- Tyrrell, Sir James (English soldier)
Sir James Tyrrell was an English soldier and royal official alleged by the 16th-century Humanist Sir Thomas More to have murdered the 12-year-old king Edward V and his younger brother Richard in the Tower of London in August 1483. Modern research has shown that there is little evidence for More’s
- Tyrrhenia (ancient landmass)
Alps: Geology: …crystalline rocks and known as Tyrrhenia, occupied what is today the western Mediterranean basin, whereas much of the rest of Europe was inundated by a vast sea. During the Mesozoic (about 250 million to 65 million years ago) Tyrrhenia was slowly leveled by the forces of erosion. The eroded materials…
- Tyrrhenian Basin (basin, Mediterranean Sea)
Mediterranean Sea: Natural divisions: The Tyrrhenian Basin, that part of the Mediterranean known as the Tyrrhenian Sea, lies between Italy and the islands of Sardinia and Corsica.
- Tyrrhenian Sea (sea, Mediterranean Sea)
Tyrrhenian Sea, arm of the Mediterranean Sea between the western coast of Italy and the islands of Corsica, Sardinia, and Sicily. It is connected with the Ligurian Sea (northwest) through the Tuscan Archipelago and with the Ionian Sea (southeast) through the Strait of Messina. Chief inlets of the
- Tyrrhenoi (people)
Etruscan, member of an ancient people of Etruria, Italy, between the Tiber and Arno rivers west and south of the Apennines, whose urban civilization reached its height in the 6th century bce. Many features of Etruscan culture were adopted by the Romans, their successors to power in the peninsula. A
- Tyrrhenum, Mare (sea, Mediterranean Sea)
Tyrrhenian Sea, arm of the Mediterranean Sea between the western coast of Italy and the islands of Corsica, Sardinia, and Sicily. It is connected with the Ligurian Sea (northwest) through the Tuscan Archipelago and with the Ionian Sea (southeast) through the Strait of Messina. Chief inlets of the
- Tyrsenoi (people)
Etruscan, member of an ancient people of Etruria, Italy, between the Tiber and Arno rivers west and south of the Apennines, whose urban civilization reached its height in the 6th century bce. Many features of Etruscan culture were adopted by the Romans, their successors to power in the peninsula. A
- Tyrtaeus (Greek poet)
Tyrtaeus was a Greek elegiac poet, author of stirring poetry on military themes supposedly composed to help Sparta win the Second Messenian War. Greek tradition after the 6th century claimed that Tyrtaeus was a schoolmaster from Athens or Miletus, sent to Sparta in reluctant compliance with an
- Tyrus (town and historical site, Lebanon)
Tyre, town on the Mediterranean coast of southern Lebanon, located 12 miles (19 km) north of the modern border with Israel and 25 miles (40 km) south of Sidon (modern Ṣaydā). It was a major Phoenician seaport from about 2000 bce through the Roman period. Tyre, built on an island and on the
- Tyrwhitt, Reginald (British admiral)
Battle of Dogger Bank: Dogger Bank and the pursuit of the German fleet: … under the command of Commodore Reginald Tyrwhitt from Harwich. At 9:00 pm that night, the 3rd Battle Squadron of seven King Edwards-class pre-dreadnought battleships sortied from Rosyth, and Adm. Sir John Jellicoe put to sea with the main battle fleet from Scapa Flow.