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Tarim

(Encyclopedia)Tarim dārēmˈ [key], Mandarin Dayan, chief river of Xinjiang Uygur Autonomous Region, NW China, c.1,300 mi (2,090 km) long, formed by the union of the Aksu and the Yarkant rivers at the western end ...

Schawlow, Arthur Leonard

(Encyclopedia)Schawlow, Arthur Leonard shôˈlō [key], 1921–99, American physicist, b. Mount Vernon, N.Y., grad. Univ. of Toronto (Ph.D. 1949). Although his research focused on optics, in particular, lasers and ...

dysprosium

(Encyclopedia)dysprosium dĭsprōˈzēəm [key] [Gr.,=hard to get at], metallic chemical element; symbol Dy; at. no. 66; at. wt. 162.500; m.p. 1,412℃; b.p. 2,562℃; sp. gr. 8.54 at 25℃; valence+3. Dysprosium i...

e, in mathematics

(Encyclopedia)e, in mathematics, irrational number occurring widely in mathematics and science, approximately equal to the value 2.71828; it is the base of natural, or Naperian, logarithms. The number e is defined ...

Alexievich, Svetlana Alexandrovna

(Encyclopedia)Alexievich, Svetlana Alexandrovna, 1948–, Belarusian journalist and nonfiction writer, grad. Univ. of Minsk (1972). She was a working journalist before she began writing books in the 1980s. Her firs...

europium

(Encyclopedia)europium yo͝orōˈpēəm [key] [from Europe], metallic chemical element; symbol Eu; at. no. 63; at. wt. 151.964; m.p. about 820℃; b.p. about 1,600℃; sp. gr. 5.25 at 25℃; valence +2 or +3. Europ...

Alvarez, Luis Walter

(Encyclopedia)Alvarez, Luis Walter, 1911–88, American physicist, b. San Francisco, grad. Univ. of Chicago, 1932, Ph.D. 1936. He was awarded the 1968 Nobel Prize in Physics for his discovery of a large number of r...

hydrogen fluoride

(Encyclopedia)hydrogen fluoride, chemical compound, HF, a colorless, fuming liquid or colorless gas that boils at 19.54℃. It is miscible with water and is soluble in benzene, toluene, and concentrated sulfuric ac...

Homestead

(Encyclopedia)Homestead. 1 City (2020 pop. 80,737), Dade co., SE Fla.; inc. 1913. A large Miami suburb with a growing Hispanic population, Homestead is a trade ...

Morgenthau, Hans Joachim

(Encyclopedia)Morgenthau, Hans Joachim, 1904–80, American political scientist and foreign policy analyst, b. Coburg, Germany. After studying at the universities of Frankfort and Munich, he attended the Graduate I...