Texas Rangers, law enforcement body, part of the Texas department of public safety.
21st Century Webster's Family Encyclopedia - Texas Rangers to Tranquilizer
Textile, fabric made from natural or synthetic fibers, whether knitted, woven, bonded, or felted.
Thackeray, William Makepeace (1811–63), English novelist, essayist, and illustrator.
Thailand, Kingdom of Thailand, formerly Siam, constitutional monarchy in Southeast Asia. Thailand is bordered by Myanmar (Burma) to the west and northwest, Laos in the north and east, Cambodia to the southeast, and Malaysia and the Gulf of Siam to the south. The capital is Bangkok. Thailand takes up an area of 198,115 sq mi (513,115 sq km) and is divisible into 3 main areas. The principle region i…
Thalassemia, inherited blood disorder in which hemoglobin is not adequately produced.
Thales (625?–546? B.C.), first known Greek philosopher.
Thalidomide, mild sedative introduced in the late 1950s and withdrawn a few years later when it was found to be responsible for congenital deformities in children born to mothers who took the drug.
Thallium, chemical element, symbol Tl; for physical constants see Periodic Table.
Thames River, England's chief waterway, winding east from the Cotswolds to its North Sea estuary.
Thanksgiving Day, since 1863, an annual U.S. national holiday to give thanks for blessings received during the year.
Thant, U (1909–74), Burmese diplomat, United Nations secretary-general (1961–71).
Thar Desert, also called the Indian Desert, located in northwest India and eastern Pakistan.
Tharp, Twyla (1941– ), U.S. choreographer and dancer.
Thatcher, Margaret Hilda (1925– ), English prime minister(1979–90).She entered Parliament in 1959 and served (1970–74) as secretary of state for education and science.
Thayer, Sylvanus (1785–1872), U.S.
The Roman plays of Plautus, Terence, and Seneca were influenced by Greek theater. However, mime and pantomime were the popular theatrical forms in the Roman Empire. After the fall of the Empire, theater was banned by the Church until the 9th century. Medieval drama evolved from musical elaborations of the church service. Eventually these developed into mystery plays and were moved outdoors onto pl…
Theater of the Absurd, term to describe plays in which traditional values are unable to fulfill emotional and spiritual needs.
Thebes, ancient Greek city located on same site as the modern-day Greek city of Thivai.
Thebes, southern city in ancient Egypt, located on the Nile River; present-day city of Luxor.
Theism, philosophical system, as distinguished from deism and pantheism, that professes the existence of a personal, transcendent God who created, preserves, and governs the world.
Themistocles (514?–449? B.C.), incient Greek politician and military strategist of Athens.
Theocracy, government in which power and authority are seen as derived directly from God and rulers are considered either incarnations or representative of divine power.
Theocritus (c.3rd century B.C.), poet of ancient Greece.
Theodoric (A.D. 455?–526), conqueror of Italy, king of Ostrogoths.
Theodosius I (A.D. 346–395), emperor of Rome.
Theology, science of religious knowledge; the formal analysis of what is believed by adherents of a religion, making its doctrine coherent, elucidating it logically, and relating it to secular disciplines. Most religions have no well-developed theology. The concept arose in Greek, but its elaboration took place only in Christianity. The early Church Fathers and Doctors formulated doctrine in conte…
Theorell, Axel HugoTeodor (1903–82), Swedish biochemist awarded the 1955 Nobel Prize for physiology or medicine for his studies of enzyme action, specifically the roles of enzymes in biological oxidation and reduction processes.
Theorem See: Geometry; Pythagorean theorem.
Theosophy (Greek, “divine wisdom”), mystical system of religious philosophy claiming direct insight into the divine nature.
Theotokopoulos, Domenikos See: Greco, El.
Therapy See: Occupational therapy; Physical therapy; Psychotherapy.
Theresa, Saint See: Teresa.
Thermal pollution, ecologically harmful warming of rivers, lakes, or oceans.
Thermal springs See: Hot springs.
Thermocouple, electric circuit involving two junctions between different metals, or semiconductors.
Thermodynamics, division of physics concerned with the interconversion of heat, work, and other forms of energy, and with the states of physical systems. Classical thermodynamics is basic to engineering, parts of geology, metallurgy, and physical chemistry. Building on earlier studies of temperature and heat, Sadi Carnot pioneered the science with his investigations of the cyclic heat engine (1824…
Thermography, method to measure the slightest variations in temperature of soft tissue in the body using infrared heat sensors.
Thermometer, instrument for measuring the temperature of a substance or object.
Thermopylae (Greek, “hot gates”), narrow mountain pass that in ancient Greece led from the north to the south.
Thermosphere, outermost layer of the earth's atmosphere, at altitudes between approximately 53 mi (85 km) and 300 mi (480 km).
Thermostat, device for maintaining a material or enclosure at a constant temperature by automatically regulating its heat supply, which is cut off if the temperature exceeds and reconnected if it falls below that required.
Theropod See: Dinosaur.
Theseus, in Greek mythology, son of King Aegeus and princess Aethra, renowned for his heroism.
Thespis (c. 6th century B.C.), ancient Greek actor.
Thessalonians, Epistles to the, books 13 and 14 of the New Testament Bible.
Thessaloniki See: Salonika.
Thessaly, northeast region of Greece in which Mount Olympus of ancient Greek legend is located.
Thiamine See: Vitamin.
Thibault, Jacques A.F See: France, Anatole.
Thiers, Louis Adolphe (1797–1877), French author and diplomat.
Thieu, Nguyen Van (1923– ), president of South Vietnam (1967–75).
Thiopental, drug used in general anesthesia.
Third International See: International, The.
Third Reich See: Germany; Reich.
Third World, term often applied to the nonaligned (and mostly developing) nations of Africa, Latin America, and Asia as opposed to Western and Eastern (Communist) countries.
Thirty-Nine Articles, doctrine issued by the Church of England to bridge the gap between Roman Catholic and Protestant Reformation groups in 16th-century England.
Thirty Tyrants, or The Thirty, term used to identify the group of Athenians who ruled Athens after it fell to Sparta (404 B.C.).
Thirty Years' War, series of European wars (1618–48). Partly a Catholic-Protestant religious conflict, they were also a political and territorial struggle by different European powers, particularly France, against its greatest rivals, the Habsburgs, rulers of the Holy Roman Empire. War began when Bohemian Protestants accused 2 government ministrers of wrongdoing and threw them out a …
Thistle, common name for many prickly, herbaceous plants (family Compositae).
Thomas Aquinas, Saint See: Aquinas, Saint Thomas.
Thomas à Becket See: Becket, Saint Thomas à.
Thomas, Dylan (1914–53), Welsh poet who first achieved recognition with Eighteen Poems (1934).
Thomas, George Henry (1816–70), U.S.
Thomas, Isaiah (1749–1831), U.S. printer and publisher.
Thomas à Kempis (Thomas Hermerken von Kempen; 1380–1471), German religious writer and Augustinian friar at Zwolle in the Netherlands.
Thomas, Martha Carey (1857–1935), U.S. leader in higher education and women's suffrage movement.
Thomas, Norman Mattoon (1884–1968), U.S. socialist leader who ran six times (1928, 1932, 1936, 1940, 1944, 1948) for the presidency of the United States as a Socialist Party candidate.
Thomas, Saint, one of the 12 apostles, known as “Doubting Thomas” because he would not believe Jesus' resurrection until he put his fingers in Jesus' wounds.
Thompson, Sir John Sparrow David (1844–94), Canadian diplomat and prime minister (1892–94).
Thomson, Charles (1729–1824), signer of the Declaration of Independence and secretary of the Continental Congress throughout its existence (1774–89).
Thomson, Sir Joseph John (1856–1940), British physicist.
Thomson, Virgil (1896–1989), U.S. composer and music critic.
Thor, in Norse mythology, god of thunder.
Thoreau, Henry David (1817–62), U.S. writer, naturalist, and abolitionist.
Thorium, chemical element, symbol Th; for physical constants see Periodic Table.
Thorn apple See: Jimsonweed.
Thorndike, Edward Lee (1874–1949), U.S. psychologist best known for devising tests to measure intelligence, learning, and aptitude.
Thornton, Matthew (1714?–1803), signer of the Declaration of Independence.
Thorpe, Jim (James Francis Thorpe; 1888–1953), U.S. athlete.
Thoth, Greek name for Djhowtey, an ancient Egyptian moon god who became associated with civilization, learning, and healing.
Thothmes III See: Thutmose III.
Thousand Islands, group of over 1,500 islands—some Canadian, some U.S.—in the St.
Thousand and One Nights See: Arabian Nights.
Thrace, ancient region in the eastern part of the Balkan Peninsula, southeastern Europe, bordering the Black and Aegean seas.
Thrasher, any of 17 U.S. bird species belonging to the mockingbird family.
Three Mile Island, site in the Susquehanna River, near Middletown, Penn., of a nuclear reactor that, on March 28, 1979, began to emit “puffs” of radiation as a result of malfunction of the cooling system, aggravated by problems with the computer monitors and some human error.
Three-mile limit See: Territorial waters.
Three Wise Men See: Magi.
Thrombosis, formation of a clot (thrombus) in the heart or blood vessels.
Thrush, name for a family (Turdidae) of slender-billed songbirds found in most parts of the world.
Thrush, infection due to the fungus Candida albicans.
Thucydides (460?–400 B.C.), historian of ancient Greece.
Thugs, members of an Indian religious sect (13th–19th centuries) who murdered and robbed to honor the goddess Kali.
Thulium, chemical element, symbol Tm; for physical constants see Periodic Table.
Thunder Bay (pop. 112,300), city in Ontario, Canada, on the northwestern shore of Lake Superior.
Thurber, James (1894–1961), U.S. humorist and cartoonist.
Thurmond, (James) Strom (1902– ), U.S. political leader, senator from South Carolina since 1954.
Thutmose III, or Thothmes III (d.1450 B.C.), king (c.1490–36 B.C.) of ancient Egypt.
Thyme, pungent, aromatic herb (genus Thymus) of the mint family.
Thymus, lymphoid organ situated in humans in the chest cavity, behind the breastbone, and extending into the neck.
Thyroid gland, ductless two-lobed endocrine gland lying in front of the trachea in the neck.
Tian Shan, or Tien Shan, major mountain system of central Asia.
Tianjin, or Tientsin (pop. 5,770,000), international port city on the Hai River in northeastern China.
Tiber River, river in central Italy, flowing 252 mi (405.5 km) from the Appenines south through Umbria and Latium and southwest through Rome to the Tyrrhenian Sea near Ostia.
Tiberias, Lake See: Galilee, Sea of.
Tiberius (Tiberius Julius Caesar Augustus; 42 B.C.–A.D. 37), Roman emperor, successor of his stepfather, Augustus, upon his death in A.D. 14.
Tibet, autonomous region of China in central Asia, bordering Myanmar (Burma), India, Nepal, Bhutan, and Sikkim. The capital is Lhasa. Tibet's area is 471,662 sq mi (1,221,600 sq km), and the region averages 15,000 ft (4,570 m) in altitude. Tibet is often called the “Roof of the World.” The tallest mountain in the world, Mt. Everest (29,028 ft/8,848 m above sea level), is in th…
Tick, name for a group of parasitic arthropods (order Acarina).
Tickseed See: Coreopsis.
Ticonderoga, village in northeast New York, near Lake George, site of Fort Ticonderoga, which commanded the route between Canada and the Hudson River valley.
Tide, periodic rise and fall of land and water on the earth. Tidal motions are primarily exhibited by water: the motion of the land is barely detectable. As the earth-moon system rotates about its center of gravity, which is within the earth, the earth bulges in the direction of the moon, as well as in exactly the opposite direction owing to the moon's gravitational attraction and the centr…
Tien Shan See: Tian Shan.
Tientsiu See: Tianjin.
Tiepolo, Giovanni Battista (1696–1770), most renowned Venetian painter of his time, a capable craftsman, decorator, and artist of vivid, large murals.
Tierra del Fuego (Spanish, “Land of Fire”), several small islands (28,476 sq mi/73,753 sq km) separated from the southern coast of South America by the Strait of Magellan.
Tiffany, Charles Lewis (1812–1902), U.S. jeweler and retailer.
Tiffany, Louis Comfort (1848–1933), U.S. artist and designer, a leader of Art Nouveau; son of jeweler Charles Tiffany.
Tiflis See: Tbilisi.
Tiger (Panthera tigris), major cat of Asia with distinct races in different parts of that continent.
Tiger lily (Lilium tigrinum), plant of the lily family originating in eastern Asia and grown widely as a garden flower.
Tiglath-pileser, rulers of ancient Assyria.
Tigris River, easternmost of the two great rivers of ancient Mesopotamia.
Tijuana (pop. 742,700), city in Mexico, near the U.S. border.
Tikhonov, Nikolai Aleksandrovich (1905– ), soviet premier (1980–85).
Tilden, Bill (William Tatem Tilden, Jr.; 1893–1953), U.S. tennis player.
Tilden, Samuel Jones (1814–86), U.S. lawyer and politician.
Tilefish, colorful ocean fish belonging to the tilefish family, found along the New England coastline.
Tillich, Paul Johannes (1886–1965), German-born theologian and teacher.
Timbuktu (pop. 20,500), city in central Mali, in the southern Sahara.
Time, measure of duration, whether past, present, or future; a particular portion or part of duration; period at which any definite event occurred or person lived; prevailing state or circumstances. Absolute time is time considered without relation to bodies or their motions. Relative time is the sensible measure of any portion of duration. Astronomical time is mean solar time reckoned through the…
Timor, largest and easternmost of the Lesser Sunda Islands, 400 mi (644 km) northwest of Australia.
Timothy (Phleum pratense), perennial coarse grass grown for hay harvesting and animal grazing.
Timothy, disciple of the Apostle Paul; also, 2 epistles of the New Testament addressed to Timothy.
Timpani, or kettledrums, drums having a calfskin head over a hollow brass or copper hemisphere.
Timur the Lame See: Tamerlane.
Tin, chemical element, symbol Sn; for physical constants see Periodic Table.
Tinbergen, Jan (1903–94), Dutch economist who in 1969 shared the first Nobel Prize for economic science with Ragnar Frisch for work in developing dynamic models (econometrics).
Tinbergen, Nikolas (1907–88), Dutch ethologist awarded, with Konrad Lorenz and Karl von Frisch, the 1973 Nobel Prize for physiology or medicine for their individual, major contributions to the science of animal behavior.
Tinnitus, sensation of sounds not derived from the outer environment, such as ringing, roars, or banging in the inner ear.
Tintoretto (Jacopo Robusti; 1518–94), Venetian mannerist painter of the Renaissance.
Tippecanoe, Battle of See: Indian wars.
Tipperary (pop. 5,000), town in southern Ireland established in the late 12th century, located on the Ara River.
Tiranë, or Tirana (pop. 244,200), capital of Albania, located about 20 mi (32 km) east of the Adriatic Sea.
Tirso de Molina (1584–1648), pen name of Spanish author and playwright, Gabriel Tellez.
Tissue, in biology, similar cells grouped together in multicellular animals and plants.
Tissue transplant, permanent transfer of tissue or organs from one part of a body to another.
Titanic, 46,328-ton British liner that sank in 1912 after hitting an iceberg on its maiden voyage.
Titaniferous ore, blend of minerals rich in the metal titanium.
Titanium, chemical element, symbol Ti; for physical constants see Periodic Table.
Titans, in Greek mythology, offspring of Uranus and Gaea, including Cronus, Hyperion, Iapetus, Oceanus, Coeus, Creus, Theia, Rhea, Mnemosyne, Phoebe, Tethys, and Themis, as well as their descendants (e.g., Atlas, Prometheus).
Titchener, Edward Bradford (1867–1927), English-born U.S. psychologist.
Titi, small tree-dwelling monkey belonging to the New World monkey family Cebidae and found in Brazil's Orinoco River Basin.
Titian (Tiziano Vecellio; 1487–1576), Venetian painter, leading Renaissance artist.
Titmouse, forest bird of the family Pariclae, found mainly in the Northern Hemisphere.
Tito, Josip Broz (1892–1980), president of former Yugoslavia (1953–80), founder of the post-World War II republic.
Titus (Titus Flavius Sabinus Vespasianus; A.D.39–81), Roman emperor, successor (79) to his father Vespasian.
Titus, early Christian follower of St.
TNT, or trinitrotoluene, [CH3C6H2(NO2)3], pale yellow crystalline solid made by nitration of toluene.
Toad, name strictly referring only to members of the family Bufonidae, but generally distinguishing warty-skinned, tailless amphibians from smoother-skinned types, which are called frogs.
Toadstool See: Mushroom.
Tobacco, plant of the nightshade family (especially genus Nicotiana); also, the dried and cured leaves of the plant, used for smoking and chewing and as snuff.
Tobago See: Trinidad and Tobago.
Tobey, Mark (1890–1976), U.S. painter.
Tobin, Daniel Joseph (1875–1955), Irish-born U.S. labor leader.
Tobin, James (1918– ), U.S. economist.
Tobit, or Tobias, Book of, in the Apocrypha, account of how Tobias, son of the devout but blinded Jew Tobit (or Tobias), successfully undertook a dangerous journey, helped by the angel Raphael, to exorcise a demon from, and marry, Sara.
Toboganning, sport of riding down snow or ice slopes on a sled or toboggan.
Tocopherol See: Vitamin.
Tocqueville, Alexis de (1805–59), French historian and writer best known for the 2-volume Democracy in America, written after visiting the United States in the early 1830s.
Todd, Mary See: Lincoln, Mary Todd.
Tofu, or bean curd, soft, white, cheeselike food made by treating soybean milk with coagulants and pressing the curds into cakes.
Toga, robe worn in ancient Rome.
Togo, republic in West Africa. Bordered by Ghana on the west, Benin on the east, Burkina Faso on the north, and the Gulf of Guinea on the south, Togo has an area of 21,925 sq mi (56,785 sq km) and is 340 mi (547 km) long and 70 mi (113 km) wide. The capital is the seaport of Lomè. From the central Togo Mountains a grassy plateau slopes east to the Mono River and south to the sandy coastal p…
Tojo, Hideki (1884–1948), Japanese military and political leader.
Tokyo (pop. 7,927,100), capital of Japan. It lies at the head of Tokyo Bay on the southeastern coast of Honshu Island and contains over 10% of Japan's population. Founded in the 12th century as Edo, it became capital of the Tokugawa shoguns in 1603; it was renamed and made imperial capital in 1868. Reconstruction after earthquake and fire (1923) and the air raids of World War II tran…
Toledo (pop. 329,300), city in northwestern Ohio, at the mouth of the Maumee River on Lake Erie.
Toledo (pop. 62,800), city in central Spain 40 mi (64 km) southwest of Madrid, seat of Toledo province, former Roman and Visgoth capital.
Tolkien, J(ohn) R(onald) R(euel) (1892–1973), English author and scholar, celebrated for The Hobbit (1937) and the trilogy The Lord of the Rings (1954–56), which present a mythical world of elves and dwarfs, partly based on Anglo-Saxon and Norse folklore.
Tolstoy, Aleksei Nikolaevich (1882–1945), Russian novelist and playwright, best known for his trilogy The Road to Calvary (1921–40), the novella Nikita's Childhood (1922), and the novel Peter the First (1929–45).
Tolstoy, Leo (1828–1910), Russian novelist.
Toltec, Native American civilization dominant in the central Mexican highlands between the 900s and 1100s.
Toluene (C6H5CH3), liquid hydrocarbon related to benzene.
Tom Thumb, General (1838–83), stage name for the U.S. entertainer Charles Sherwood Stratton.
Tomato (Lycopersicon esculentum), herbaceous plant of the nightshade family, native to South America but introduced to Europe in the 16th century and now cultivated worldwide; also, the fruit of the plant.
Tombstone (pop. 1,632), city in southeastern Arizona, founded in 1879 after the discovery of silver veins in the nearby mountains.
Tonegawa, Susumu (1939– ), Japanese biologist.
Tonga, or Friendly Islands, constitutional monarchy in the South Pacific.
Tongue, muscular organ in the floor of the mouth, concerned with the formation of food boluses and self-cleansing of the mouth, taste sensation and voice production.
Tonkin, historic region of Southeast Asia, now comprising most of northern Vietnam.
Tonsil, name for either of two small oval-shaped, fleshy bodies, situated on each side of the back of the throat (palatine tonsils).
Tonsillitis, inflammation of the tonsils due to virus or bacteria infection.
Topaz, aluminum silicate mineral of composition Al2SiO4(F,OH)2, forming prismatic crystals (orthorhombic) that are variable and unstable in color and valued as gemstones.
Topeka (pop. 119,000), state capital of Kansas, located on the Kansas River in the northeastern part of the state.
Topology, branch of mathematics that studies properties of geometrical figures or abstract spaces that are independent of shape or distance.
Torah (Hebrew: “law, teaching”), the Pentateuch (first five books of the Bible) kept in the ark of every synagogue.
Tornado, violent whirlwind cloud of small diameter, extending downward from a convective cloud in a severe thunderstorm, generally funnelshaped.
Toronto (pop. 3.893,000), capital of Ontario province and York County, second-largest city in Canada (after Montreal), on the northwestern shore of Lake Ontario.
Torpedo, flat, broad fish of the Torpedinidae family, found in tropical and temperate regions of the Atlantic and Pacific oceans.
Torpedo, self-propelled streamlined missile that travels underwater, its explosive warhead detonating when it nears or strikes its target.
Torpedo boat See: PT boat.
Torquemada, Tomás de (1420–98), Spanish Inquisition leader.
Torricelli, Evangelista (1608–47), Italian physicist and mathematician who invented the barometer in 1643.
Torsion balance, device for measuring the force of a twisting motion.
Torsion bar suspension, system designed to absorb front-end shock in automobiles.
Tort (French, “wrong”), in law, a wrongful act against a person or their property for which that person can claim damages as compensation.
Tortoise, name for slow-moving, herbivorous, heavily armored terrestrial reptiles of the family Testudinidae, found in the tropics, subtropics, and warmer temperate regions.
Tory Party, popular name of the Conservative and Unionist Party, one of Britain's two chief parties.
Toscanini, Arturo (1867–1957), Italian conductor, one of the greatest of his time.
Totalitarianism, system of government in which the state exercises wide-ranging control over individuals within its jurisdiction.
Totem, object, animal, or plant toward which a tribe, clan, or other group feels a special affinity, often considering it a mythical ancestor.
Toucan, exotic bird of the family Ramphastidae, native to the tropical regions of Latin America.
Touch, sensory system concerned with surface sensation, found in all external body surfaces including the skin and some mucous membranes.
Touch-me-not, wild flower of the balsam family, related to the impatiens.
Toulon (pop. 170,200), port city in southeastern France.
Toulouse (pop. 365,900), historically significant city in southwestern France, located on the Garonne River.
Toulouse-Lautrec, Henri de (1864–1901), French painter and lithographer who portrayed Parisian nightlife.
Touré, Sékou (1922–84), president of the Republic of Guinea (1958–84).
Tourette syndrome, disorder of the central nervous system characterized by muscular tics, or twitches, and uncontrollable vocalizing.
Tourmaline, hard, complex silicate mineral containing such elements as boron, aluminum, and silicon.
Tournament, or tourney, series of games; originally a combat between armored knights, usually on horseback.
Tours (pop. 133,400), city in west-central France along the Loire River.
Toussaint L'Ouverture (Pierre Dominique Toussaint-Bréda; c.1774–1803), emancipated Haitian slave who led the 1791 slave rebellion on the island of Haiti.
Tower of Babel, mythical tower built in the ancient Mesopotamian city of Babylon.
Tower of London, ancient fortress on the Thames River in the eastern part of London.
Town meeting, direct democratic form of local government, mainly inNew England (Massachusetts, New Hampshire, and Vermont).
Townes, Charles Hard (1915– ), U.S. physicist awarded the 1964 Nobel Prize for physics, with Nikolai Basov and Aleksander Prokhorov, for independently working out the theory of the maser and, later, the laser.
Townsend, Francis Everett (1867–1960), U.S. reformer, author of the Townsend Plan (1933), a share-the-wealth program by which citizens over 60 were to receive $200 a month, the money to be raised by a federal tax.
Townsend, Willard Saxby (1895–1957), one of the first African-American labor leaders.
Toxemia of pregnancy, or preeclampsia, disease caused by bacterial toxins or other toxic substances in the blood, usually referring to a condition that attacks women in the last stages of pregnancy or just after childbirth.
Toxic shock syndrome (TSS), rare and sometimes fatal bacterial disease associated with the use of tampons.
Toxic wastes See: Hazardous wastes.
Toxin, poisonous substance produced by a living organism.
Toy dog, any of several small breeds of dogs kept as pets.
Toynbee, Arnold Joseph (1889–1975), English historian.
Trace elements, minerals that make up all human, animal, and plant life.
Trachea, conduit by which air reaches the lungs from the pharynx.
Trachoma, chronic conjunctivitis caused by Chlamydia trachomatis.
Track and field, athletic sports including running, walking, hurdling, jumping for distance or height, and throwing various objects. The revival of the Olympic Games in 1896 gave international and national competition an enormous boost, and in 1912 the International Amateur Athletes Federation was set up. Distances raced vary from the 50-m sprint to the 5,0000-m run. Hurdlers and steeplechasers ha…
Tracy, Spencer (1900–67), U.S. film actor.
Trade, buying and selling of commodities. It can take place within a nation (domestic trade) or between nations (foreign or international trade). Trade occurs because the people of a particular community or country do not produce all the goods they need. As a consequence, they must purchase these goods from another community or country. They may in turn sell their products to other communities or …
Trade route, land or water route used to transport goods from one area to another.
Trade union See: Labor movement.
Trade winds, persistent warm moist winds that blow westward from the high pressure zones at about 30°N and °S latitude toward the doldrums (intertropical convergence zone) at the equator.
Trademark, name, symbol, or other device that identifies the product of one company.
Trafalgar, Battle of, decisive naval engagement of the Napoleonic Wars, fought on Oct. 21, 1805.
Tragedy, form of drama originating in ancient Greece, in which exceptional characters are led, by fate and by the very qualities that make them great, to suffer calamity and often death.
Tragopan, any of 5 species of birds in the pheasant family.
Trail of Tears See: Oklahoma.
Trajan (A.D. 53–117), Roman emperor responsible for great extensions of the empire and vast building programs.
Tranquilizer, any of the agents that induce a state of quietude in anxious or disturbed patients.