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.

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, 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

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

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

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…

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, 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

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

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.

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 rex: …which the study’s authors called T. mcraeensis.

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

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

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, 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

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

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…

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.…

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, 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

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, 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, 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

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.

Rick Riordan: … (2017), The Burning Maze (2018), The Tyrant’s Tomb (2019), and The Tower of Nero (2020).

Phanias: In his Tyrants of Sicily he seems to have dealt with Western history against a pan-Hellenic background.

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…

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

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

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

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

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

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 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

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,

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, naturally occurring dye highly valued in antiquity. It is closely related to indigo

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,

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

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…

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.

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.

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

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 (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, 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

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).

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…

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

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

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, 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

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, 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

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

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…

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

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…

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

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)…

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…

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.

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

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…

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, 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

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

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

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 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

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

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.

Thomas Tyrwhitt was an English scholar especially notable for his work on the medieval English poet Geoffrey Chaucer. In classical and English scholarship alike, Tyrwhitt showed the same qualities of balance, wide knowledge, and critical acumen. (He was the one man able, on linguistic grounds

Tisza River, a major tributary of the middle Danube River, rising in the Bukovina segment of the Carpathian Mountains. Its two headstreams, the Black and White Tisza, unite east of Sighet, Romania, on the Ukraine-Romania border. From Sighet the Tisza flows northwest through a small portion of

multiple sclerosis: Treatment of multiple sclerosis: Natalizumab (Tysabri), a monoclonal antibody (an antibody clone derived from a single immune cell), is also effective for controlling the severity and frequency of relapses. Natalizumab attaches to molecules on the cell membrane of lymphocytes, preventing them from entering the central nervous system and attacking…

Arkansas: Manufacturing: …the early 21st century was Tyson Foods, Inc., with its corporate headquarters in Springdale. Tyson started in northwest Arkansas as one of the many poultry companies that established themselves in the region in the early 20th century. Through expansions and acquisitions, Tyson Foods became one of the largest poultry and…

Cicely Tyson was an American model and actress noted for her vivid portrayals of strong African American women. Tyson’s birth year is generally believed to be 1924, though some sources give 1933. She was the daughter of immigrants from the Caribbean island of Nevis, and she grew up in a devoutly

Edward Tyson was an English physician and pioneer of comparative anatomy whose delineation of the similarities and differences between men and chimpanzees (he called them “orang-outangs”) provided an empirical basis for the study of man. His work suggested a continuity of traits between humans and

Mike Tyson is an American boxer who, at age 20, became the youngest heavyweight champion in history. His achievements in the ring, however, were often overshadowed by his turbulent personal life. (Read Gene Tunney’s 1929 Britannica essay on boxing.) A member of various street gangs at an early age,

Mike Tyson is an American boxer who, at age 20, became the youngest heavyweight champion in history. His achievements in the ring, however, were often overshadowed by his turbulent personal life. (Read Gene Tunney’s 1929 Britannica essay on boxing.) A member of various street gangs at an early age,

Neil deGrasse Tyson is an American astronomer who popularized science with his books and frequent appearances on radio and television. (Read Neil deGrasse Tyson’s Britannica essay on public science.) When Tyson was nine years old, his interest in astronomy was sparked by a trip to the Hayden

guillemot: …the three species is the black guillemot, or tystie (C. grylle). It is about 35 cm (14 inches) long and is coloured black with white wing patches in the breeding season. In winter it is fully white below and speckled brown and white above. The black guillemot breeds around the…

Aleksey Feofilaktovich Pisemsky: …best achievements are the novel Tysyacha dush (1858; “A Thousand Souls”), a memorable portrait of a “new man,” Kalinovich, who marries, in spite of his love for another girl, the crippled heiress of “a thousand souls” (serfs) and climbs to the rank of provincial governor, a post he fills with…

James Tytler was a Scottish editor of the Encyclopædia Britannica’s second edition, who was sometimes called “Balloon Tytler” because of his experiments in aeronautics. Known in Edinburgh as a debt-ridden eccentric, between 1776 and 1784 Tytler almost single-handedly revised the original edition of

barn owl, any of several species of nocturnal birds of prey of the genus Tyto (family Tytonidae). Barn owls are sometimes called monkey-faced owls because of their heart-shaped facial disks and absence of ear tufts. They are about 30 to 40 cm (12 to 16 inches) long, white to gray or yellowish to

barn owl: The common barn owl (T. alba) occurs worldwide except in Antarctica and Micronesia. Other species occur only in the Old World. Many inhabit open grasslands. Some are called grass owls (such as the common grass owl, T. capensis, of India, the South Pacific, Australia, and South…

owl: Annotated classification: Family Tytonidae (barn owls, grass owls, and bay owls) 21 species in 2 genera found from tropical to temperate regions; body length 30–54 cm (12–21 inches); heart-shaped facial disk completely encircling face, bill comparatively long and slender; legs rather long; middle claw with comb. Family Strigidae

Caspian Sea: Physical features: The largest are Chechen, Tyuleny, Morskoy, Kulaly, Zhiloy, and Ogurchin.

Tyumen, oblast (region), central Russia, in the Ob-Irtysh Basin. In the extreme west the Ural Mountains attain 6,217 feet (1,895 m) in Mount Narodnaya, but the remainder of the oblast’s huge area is a low, exceptionally flat plain, with innumerable lakes and very extensive swamps. The oblast

Tyumen, city and administrative centre of Tyumen oblast (region), central Russia. The city lies in the southwestern part of the West Siberian Plain. It is situated on both banks of the Tura River at its crossing by the Trans-Siberian Railroad. Founded in 1586, it is the oldest Russian city in

Bandelier National Monument: …the large, circular pueblo of Tyuonyi, which lies in Frijoles Canyon, and Tsankawi, an unexcavated ruin located on a mesa about 11 miles (18 km) northeast of the main portion of the monument. Kivas (ceremonial chambers) and man-made caves also have been unearthed. Piñon pine, yucca, sagebrush, and juniper grow…

Baikonur Cosmodrome, former Soviet and current Russian space centre in south-central Kazakhstan. Baikonur was a Soviet code name for the centre, but American analysts often called it Tyuratam, after the railroad station at Tyuratam (Leninsk), the nearest large city. The Baikonur Cosmodrome lies on

Anousheh Ansari: …September 18, 2006, with commander Mikhail Tyurin of Russia and flight engineer Michael Lopez-Alegria of the United States. On September 20, 2006, the spacecraft docked to the International Space Station, where Ansari spent eight days. She performed a series of experiments concerning human physiology for the European Space Agency, was…

Wyomia Tyus is an American sprinter who held the world record for the 100-metre race (1964–65, 1968–72) and was the first person to win the Olympic gold medal twice (1964, 1968) in that event. Tyus attracted national attention as a high-school runner and as an athlete at Tennessee State University

Fyodor Tyutchev was a Russian writer who was remarkable both as a highly original philosophic poet and as a militant Slavophile, and whose whole literary output constitutes a struggle to fuse political passion with poetic imagination. The son of a wealthy landowner, educated at home and at Moscow

Fyodor Tyutchev was a Russian writer who was remarkable both as a highly original philosophic poet and as a militant Slavophile, and whose whole literary output constitutes a struggle to fuse political passion with poetic imagination. The son of a wealthy landowner, educated at home and at Moscow

tyuyamunite, radioactive, yellow, soft, and waxy uranium and vanadium oxide mineral, Ca(UO2)2(VO4)2·5–8H2O. It is considered to be the calcium analogue of carnotite, from which it can be made artificially and reversibly by cation exchange (calcium exchanges places with potassium in carnotite’s

Tyva, republic in south-central Siberia, Russia. Tyva borders northwestern Mongolia and occupies the basin of the upper Yenisey River. Its relief consists of two broad basins, the Tyva and Todzha, drained by two main tributaries of the Yenisey River. High mountain ranges, including the Eastern

Russia: The mountains of the south and east: …and which enclose the high Tyva Basin. Subsidiary ranges extend northward, enclosing the Kuznetsk and Minusinsk basins.