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pit bull

(Encyclopedia)pit bull, dog having a smooth coat, a stocky build, and a blocky head, originally bred for fighting from bulldog and terrier breeds. Pit bulls were used in bull- and bearbaiting for centuries and as g...

Pretorius, Andries Wilhelmus Jacobus

(Encyclopedia)Pretorius, Andries Wilhelmus Jacobus prĭtôrˈēəs, Du. änˈdrēs vĭlhĕlˈməs yäkōˈbəs prātôrˈēəs [key], 1799–1853, Boer (Afrikaner) leader. He was elected (1838) commandant general o...

phenylketonuria

(Encyclopedia)phenylketonuria fĕnˌəlkētˌəno͝orˈēə [key] (PKU), inherited metabolic disorder caused by a deficiency in a specific enzyme (phenylalanine hydroxylase). The absence of this enzyme, a recessive...

Philby, Kim

(Encyclopedia)Philby, Kim (Harold Adrian Russell Philby), 1912–88, British double agent, son of Harry St. John Bridger Philby, studied Trinity College, Cambridge. A longtime high-ranking member of Britain's MI6 i...

Ogilvy, David Mackenzie

(Encyclopedia)Ogilvy, David Mackenzie, 1911–99, British-American advertising executive. He was a chef in Paris and a door-to-door salesman before entering advertising, becoming an account executive in Britain and...

Benedetti, Mario

(Encyclopedia)Benedetti, Mario, 1920–2009, Uruguayan writer, one of Latin America's most popular, influential, and prolific authors. The son of Italian immigrants, he grew up and was educated in Montevideo. Bened...

valve

(Encyclopedia)valve, device for controlling the flow of fluids (liquids and gases). Valves vary in construction and size depending upon their function. Some are classified according to their method of operation or ...

Williams, C. K.

(Encyclopedia)Williams, C. K. (Charles Kenneth Williams), 1936–2015, American poet, b. Newark, N.J., grad. Univ. of Pennsylvania, 1959. He wrote more than 20 books of poetry, rich in detail, with complex syntax a...

Carrel, Alexis

(Encyclopedia)Carrel, Alexis kärĕlˈ, kə– [key], 1873–1944, American surgeon and experimental biologist, b. near Lyons, France, M.D. Univ. of Lyons, 1900. Coming to the United States in 1905, he joined the s...

Yalow, Rosalyn Sussman

(Encyclopedia)Yalow, Rosalyn Sussman, 1921–2011, American medical physicist, b. New York City, Ph.D. Univ. of Illinois, 1945. As a researcher at the Bronx Veterans Administration Hospital (from 1947), Yalow and c...