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Masai

(Encyclopedia)Masai or Maasai mäsīˈ [key], a largely nomadic pastoral people of E Africa, chiefly in Kenya and Tanzania. Cattle and sheep form the basis of the economy that they have maintained in resistance to ...

swordfish

(Encyclopedia)swordfish, large food and game fish, Xiphias gladius, of the warmer Atlantic and Pacific waters. It is named for its sharp, broad, elongated upper jaw, which it uses to flail and injure its prey of sm...

Richards, Ellen Henrietta Swallow

(Encyclopedia)Richards, Ellen Henrietta Swallow, 1842–1911, American chemist, educator, and organizer of the home economics movement, b. Dunstable, Mass., grad. Vassar, 1870. In 1870 she began the study of chemis...

Challenger

(Encyclopedia)Challenger, U.S. space shuttle. It exploded (Jan. 28, 1986) 73 seconds into its tenth flight, killing all seven crew members, including the first civilian in space, schoolteacher Christa McAuliffe. Th...

Esper, Mark Thomas

(Encyclopedia)Esper, Mark Thomas, 1964–, U.S. army officer and government official, b. Uniontown, Pa., B.S West Point, 1986; M.P.A. Harvard, 1995, Ph.D. George Washington Univ., 2008. Rising to the rank of lieute...

Htin Kyaw

(Encyclopedia)Htin Kyaw tĭn chô [key], 1946–, Burmese political leader, grad. Rangoon Univ. (1968, 1975). He served in the ministries of industry (1975–1980) and planning and treasury (1980–92) before resig...

Morrow, Dwight Whitney

(Encyclopedia)Morrow, Dwight Whitney, 1873–1931, American banker and diplomat, b. Huntington, W.Va. He practiced law in New York City and entered (1914) the banking house of J. P. Morgan & Company. After the ...

Kassem, Abdul Karim

(Encyclopedia)Kassem, Abdul Karim äbdo͝olˈ kärēmˈ kässēmˈ [key], 1914–63, Iraqi general and politician. A graduate (1934) of the Iraqi military academy, he attended the army staff college. His outstandin...

radiation weapon

(Encyclopedia)radiation weapon or radiological weapon, a bomb or warhead that uses conventional chemical explosives to disperse radioactive material, sometimes called a “dirty bomb.” Designed to produce radiati...

Chevreul, Michel Eugène

(Encyclopedia)Chevreul, Michel Eugène mēshĕlˈ özhĕnˈ shəvrölˈ [key], 1786–1889, French chemist. He studied under L. N. Vauquelin, was director of the Gobelin tapestry works, and from 1830 was professor,...