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Piazzolla, Ástor Pantaleón

(Encyclopedia)Piazzolla, Ástor Pantaleón, 1921–92, Argentinian composer and player of the bandoneón (a large accordionlike instrument), b. Mar del Plata. He spent much of his childhood in New York, returned (1...

ceilometer

(Encyclopedia)ceilometer sēlŏmˈĭtər [key], in aviation and meteorology, automatic instrument used to record ceiling, i.e., the altitude of the lowest cloud layer covering more than half of the sky. The ceilome...

Cerro Tololo Inter-American Observatory

(Encyclopedia)Cerro Tololo Inter-American Observatory sāˈrō tōlōˈlō [key], astronomical observatory located on Cerro Tololo peak, Chile, with offices in La Serena, about 40 mi (64 km) to the west. Funded by ...

bolometer

(Encyclopedia)bolometer bōlŏmˈətər, bə– [key], instrument for detecting and measuring radiation, e.g., visible light, infrared radiation, and ultraviolet radiation, in amounts as small as one millionth of a...

Xenakis, Yannis

(Encyclopedia)Xenakis, Yannis or Iannis yänˈĭs zānäˈkĭs [key], 1922–2001, Greek-French composer, b. Brăila, Romania. Xenakis studied civil engineering in Athens (1940–47) and was active in the anti-Nazi...

Masham, Abigail, Lady

(Encyclopedia)Masham, Abigail, Lady măshˈəm [key], d. 1734, favorite of Queen Anne of England. Her maiden name was Abigail Hill. A plain, intelligent person, she became (1704) bedchamber woman to the queen throu...

Roehm, Ernst

(Encyclopedia)Roehm or Röhm, Ernst both: ĕrnst röm [key], 1887–1934, German National Socialist leader. An army officer in World War I, he met (1919) Adolf Hitler, whose political career he helped to launch. Ro...

scanning tunneling microscope

(Encyclopedia)scanning tunneling microscope (STM), device for studying and imaging individual atoms on the surfaces of materials. The instrument was invented in the early 1980s by Gerd Binnig and Heinrich Rohrer, w...

Shotwell, James Thomson

(Encyclopedia)Shotwell, James Thomson, 1874–1965, Canadian-American historian, b. Strathroy, Ont. A teacher of history at Columbia from 1900 and professor from 1908 to 1942, Shotwell also worked tirelessly to pro...

commonwealth

(Encyclopedia)commonwealth, form of administration signifying government by the common consent of the people. To Locke and Hobbes and other 17th-century writers the term meant an organized political community simil...