also spelled Dietmar, or Dithmar bishop of Merseburg and chronicler whose history of the three Ottos and Henry II, Saxon kings of Germany and Holy Roman emperors, is an important medieval Saxon document.
any protozoan of the ciliate order Thigmotrichida, found living parasitically in and about the gills or in the mantle cavity of bivalve mollusks. On the anterior part of the cell are long cilia (hairlike processes) for attaching to the host. ...
town, south-central Kenya. It lies in the highland region just northeast of the capital city of Nairobi, at an elevation of 4,943 feet (1,507 m) above sea level. Situated in a fruit-growing area, Thika specializes in fruit canning (notably pineapples); ...
small, bell-shaped implement designed to protect the end of the finger when sewing. Among the earliest known thimbles, dating from before AD 79, were those made of bronze and found at Pompeii and Herculaneum. Modern thimbles are almost exclusively produced ...
organic compound used as an antiseptic for the skin and mucous membranes, sometimes marketed under the trade name Merthiolate. It is related to merbromin (Mercurochrome) and nitromersol (Metaphen). Thimerosal disinfects by the action of the mercury in the molecule, which ...
capital of Bhutan. The city, situated in the west-central part of the country, is in the Himalaya Mountains on the Raidak (also called Thimphu, or Wong) River at about 7,000 feet (2,000 m) above sea level. It was designated the ...
in analytical chemistry, technique for separating dissolved chemical substances by virtue of their differential migration over glass plates or plastic sheets coated with a thin layer of a finely ground adsorbent, such as silica gel or alumina, that is mixed ...
in medieval Scandinavia, the local, provincial, and, in Iceland, national assemblies of freemen that formed the fundamental unit of government and law. Meeting at fixed intervals, the things, in which pure democracy theoretically operated, legislated at all levels, elected royal ...
lake, southwestern Iceland, 20 miles (32 km) east of Reykjavik. The lake is about 9 miles (14 km) long and up to 6 miles (10 km) wide and reaches a depth of 374 feet (114 m). It is the largest ...
historical site, southwestern Iceland, on the northern shore of Thingvallavatn. From 930 to 1798 it was the annual meeting place of the Althing (Parliament). Though little remains of any of the early buildings, the spectacular setting in which much of ...
any of a class of organic chemical compounds similar to the alcohols and phenols but containing a sulfur atom in place of the oxygen atom. Thiols are among the odorous principles in the scent of skunks and of freshly chopped ...
town, Moselle departement, Lorraine region, northeastern France, on the canalized Moselle River, near the Luxembourg border. It has remains of a 13th-century castle, built by the counts of Luxembourg. Formerly a part of the Holy Roman Empire, Thionville was taken ...
the simplest sulfur-containing aromatic compound, with molecular formula C4H4S, which closely resembles benzene in its chemical and physical properties. It occurs with benzene in coal tar, from which source it was first isolated in 1883. Today, thiophene is prepared commercially ...
an organic compound that resembles urea (q.v.) but contains sulfur instead of oxygen; i.e., the molecular formula is CS(NH2)2, while that of urea is CO(NH2)2. Like urea, it can be prepared by causing a compound with the same chemical composition ...
office created by Emperor Nicholas I (July 15 [July 3, old style], 1826) to conduct secret police operations. Designed by Count A.Kh. Benckendorff, who was also its first chief administrator (1826-44), the department was responsible for political security.
in French history, with the nobility and the clergy, one of the three orders into which members were divided in the pre-Revolutionary Estates-General (q.v.); it represented the great majority of the people, and its transformation into a National Assembly in ...
official Nazi designation for the regime in Germany (q.v.) from January 1933 to May 1945, as the presumed successor of the medieval and early modern Holy Roman Empire of 800 to 1806 (the First Reich) and the German Empire from ...
author of more than 30 lighthearted novels about English middle- and upper-class life in Barsetshire dealing with descendants of characters in Anthony Trollope's novels set in the same fictional locale.
a summary of the basic tenets of Judaism as perceived by the 12th-century Jewish philosopher Moses Maimonides. They first appeared in his commentary on the Mishna, Kitab al-Siraj, as an elaboration on the section Sanhedrin 10, which sets forth the ...
(1454-66), war between Poland and the Teutonic Knights that began as a revolt by the Prussian populace against their overlords, the Teutonic Knights, and was concluded by the Treaty of Torun (Thorn; Oct. 19, 1466). In 1454 rebel Prussian groups ...
(1618-48), in European history, a series of wars fought by various nations for various reasons, including religious, dynastic, territorial, and commercial rivalries. Its destructive campaigns and battles occurred over most of Europe, and, when it ended with the Treaty of ...
(March 27, 1351), episode in the struggle for the succession to the duchy of Brittany between Charles of Blois, supported by the King of France, and John of Montfort, supported by the King of England. The combat at arms was ...
the doctrinal statement of the Church of England. With the Book of Common Prayer, they present the liturgy and doctrine of that church. The Thirty-nine Articles developed from the Forty-two Articles, written by Archbishop Thomas Cranmer in 1553 "for the ...
weedy species of Cirsium, Carduus, Echinops, Sonchus, and other plant genera of the family Asteraceae. The word thistle most often refers to prickly leaved species of Carduus and Cirsium, which have dense heads of small, usually pink or purple flowers. ...
the Scottish order of knighthood whose modern period dates from King James VII of Scotland (James II of England), who revived it in 1687, and Queen Anne, who revived it again in 1703.
revolutionary who in 1820, a time of economic distress and radical unrest in England, organized the Cato Street Conspiracy to assassinate all the members of the British Cabinet.
reversible behaviour of certain gels that liquefy when they are shaken, stirred, or otherwise disturbed and reset after being allowed to stand. Thixotropy occurs in paint, such as lithopone in oil, which flows freely when stirred and reverts to a ...
longest stream in Iceland. Rising from the central plateau northeast of Hofs Glacier, it flows southwestward for 143 miles (230 km) and then discharges into the Atlantic Ocean southeast of Selfoss. The Thjors River and its largest tributary, the Tungna ...
fine-grained extrusive igneous rock, a basalt that contains plagioclase feldspar (labradorite), clinopyroxene (augite with pigeonite or hypersthene), and iron ore (magnetite and ilmenite). Tholeiitic lavas often contain glass, but little or no olivine. Tholeiite occurs as extensive plateaus (volumes on ...
in ancient Greek architecture, a circular building with a conical or vaulted roof and with or without a peristyle, or surrounding colonnade. In the Mycenaean period, tholoi were large ceremonial tombs, sometimes built into the sides of hills; they were ...
Christian theologian, the probable author of De ImitationeChristi (Imitation of Christ), a devotional book that, with the exception of the Bible, has been considered the most influential work in Christian literature.
trophy signifying world supremacy in the sport of badminton. The cup was donated in 1939 by Sir George Thomas for a series of men's international team competitions to be managed by the International Badminton Federation (IBF), of which Thomas was ...
private, state-aided, coeducational institution of higher education in Philadelphia, Pennsylvania, U.S. It has one of the largest independent medical schools in the United States. The university comprises Jefferson Medical College, the College of Health Professions, the College of Graduate Studies, ...
Scottish poet and prophet who was likely the author of the metrical romance Sir Tristrem, a version of the widely diffused Tristan legend. The romance was first printed in 1804 by Sir Walter Scott from a manuscript of about 1300. ...
associate justice of the Supreme Court of the United States from 1991, the second African American to serve on the court. Appointed to replace Thurgood Marshall, the court's first African American member, Thomas gave the court a decisive conservative cast.
Welsh poet and prose writer whose work is known for its comic exuberance, rhapsodic lilt, and pathos. His personal life, especially his reckless bouts of drinking (he died of an overdose of alcohol), was notorious.
American physician who in 1990 was corecipient (with Joseph E. Murray) of the Nobel Prize for Physiology or Medicine for his work in transplanting bone marrow from one person to another-an achievement related to the cure of patients with leukemia ...
English writer who turned to poetry only after a long career spent producing nature studies and critical works on such 19th-century writers as Richard Jefferies, George Borrow, Algernon Charles Swinburne, and Walter Pater.
Union general in the American Civil War (1861-65), known as "the Rock of Chickamauga" after his unyielding defense in combat near that stream in northwestern Georgia in September 1863.
American journalist, known especially for her coverage of U.S. presidents, who broke through a number of barriers to women reporters and won great respect in her field.
radical anti-British printer and journalist who published the Massachusetts Spy in Boston from 1770 to 1802. (The paper continued publication until 1904.)
