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Pulitzer, Joseph

(Encyclopedia)Pulitzer, Joseph po͝oˈlĭtsər, pyo͞oˈ– [key], 1847–1911, American newspaper publisher and politician, b. Hungary. He emigrated to the United States in 1864, served a year in the Union army in...

polygon

(Encyclopedia)polygon, closed plane figure bounded by straight line segments as sides. A polygon is convex if any two points inside the polygon can be connected by a line segment that does not intersect any side. I...

Unknown Soldier, Tomb of the

(Encyclopedia)Unknown Soldier, Tomb of the, form of memorial to a nation's war dead, adopted by many countries after World War I. The Tomb of the Unknowns, a memorial to the American dead of World Wars I and II, th...

Al Qaeda

(Encyclopedia)Al Qaeda or Al Qaida äl kīˈĕdə, käˈĭdä [key] [Arab.,=the base], Sunni Islamic terrorist organization with the stated goals of uniting all Muslims and establishing a transnational, strict-fund...

anthrax

(Encyclopedia)anthrax ănˈthrăks [key], acute infectious disease of animals that can be secondarily transmitted to humans. It is caused by a bacterium (Bacillus anthracis) that primarily affects sheep, horses, ho...

bin Laden, Osama

(Encyclopedia)bin Laden, Osama or Usama ōsäˈmə bĭn lädˈən, ŭsäˈmə [key], 1957?–2011, Saudi-born leader of Al Qaeda, a terrorist organization devoted to uniting all Muslims and establishing a transnati...

Eastman, Joseph Bartlett

(Encyclopedia)Eastman, Joseph Bartlett, 1882–1944, U.S. government administrator, b. Katonah, N.Y. President Wilson appointed him in 1919 to the Interstate Commerce Commission. As federal coordinator of railroads...

Gunnlaugsson, Sigmundur Davíð

(Encyclopedia)Gunnlaugsson, Sigmundur Davíð, 1975–, Icelandic political leader. He worked as a journalist and comedian for Iceland's national radio before he joined the conservative Progressive party and entere...

Lyman, Theodore

(Encyclopedia)Lyman, Theodore, 1833–97, American naturalist, b. Waltham, Mass., grad. Harvard, 1855, and Lawrence Scientific School, Harvard, 1858. He was in the Union army as an aide (1863–65) on the staff of ...

Prout, William

(Encyclopedia)Prout, William, 1785–1850, English chemist and physician. Prout's hypothesis, advanced in 1815–16, suggested that atomic weights of elements are multiples of that of hydrogen and that elements are...