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electron tube

(Encyclopedia)CE5 Triode electron tube electron tube, device consisting of a sealed enclosure in which electrons flow between electrodes separated either by a vacuum (in a vacuum tube) or by an ionized gas at l...

student movements

(Encyclopedia)student movements, designation given to the ideas and activities of student groups involved in social protest. Historically, student movements have been in existence almost as long as universities the...

erosion

(Encyclopedia)erosion ĭrōˈzhən [key], general term for the processes by which the surface of the earth is constantly being worn away. The principal agents are gravity, running water, near-shore waves, ice (most...

Seattle

(Encyclopedia)Seattle sēătˈəl [key], city (2020 pop. 737,015), seat of King co., W Wash., built on seven ...

Cleveland, Grover

(Encyclopedia)Cleveland, Grover (Stephen Grover Cleveland), 1837–1908, 22d (1885–89) and 24th (1893–97) President of the United States, b. Caldwell, N.J.; son of a Presbyterian clergyman. Cleveland's independ...

Foster, William Zebulon

(Encyclopedia)Foster, William Zebulon, 1881–1961, American Communist leader, b. Taunton, Mass. An itinerant worker in many different occupations, he was first affiliated with the Socialist party, next with the In...

Hamill, Pete

(Encyclopedia)Hamill, Pete (Wlliam Peter Hamill Jr.), 1935–2020, American journalist and author, b. Brooklyn, N.Y. He served in the U.S. Navy (1952–56) and worked as a graphic designer (1957–60) before being ...

Genet, Edmond Charles Édouard

(Encyclopedia)Genet, Edmond Charles Édouard ĕdmôNˈ shärl ādwärˈ zhənāˈ [key], 1763–1834, French diplomat, known as Citizen Genet. He had served as a French representative in Berlin, Vienna, and St. Pet...

Sotomayor, Sonia

(Encyclopedia)Sotomayor, Sonia sōtōmīyôrˈ [key], 1954–, associate justice of the U.S. Supreme Court (2009–), b. Bronx, N.Y., to Puerto Rican parents, grad. Princeton (B.A. 1976), Yale (J.D. 1979). She work...

Pusey, Nathan Marsh

(Encyclopedia)Pusey, Nathan Marsh pyo͞oˈzē [key], 1907–2001, American educator, b. Council Bluffs, Iowa, grad. Harvard (B.A., 1928; M.A., 1932; Ph.D., 1937). A classical scholar, Pusey taught at Lawrence Colle...