|
Menachem Begin
Menachem Begin , 1913-92, Zionist leader and Israeli prime minister (1977-83), b. Russia. He became (1938) leader of a Zionist youth movement in Poland, where he also earned a law degree. Begin went to Palestine in 1942; there, he headed the Irgun, a militant organization that fought against the Bri...
Read more
|
|
|
Eugene Paul Wigner
Eugene Paul Wigner , 1902-95, American physicist, b. Hungary, grad. Technische Hochschule, Berlin, 1925. He was a professor at Princeton Univ. from 1930 to 1936 and again from 1938 to 1971. In 1937 he became a U.S. citizen. During World War II he worked on the Manhattan Project , which resulted in ...
Read more
|
|
|
Ahmed
Ahmed For some names beginning thus, use Ahmad.
...
Read more
|
|
|
palaeo-
palaeo- For most words beginning thus, use paleo-.
...
Read more
|
|
supernova
supernova a massive star in the latter stages of stellar evolution that suddenly contracts and then explodes, increasing its energy output as much as a billionfold. Supernovas are the principal distributors of heavy elements throughout the universe; all elements heavier than iron are produced in ...
Read more
|
|
amphetamine
amphetamine , any one of a group of drugs that are powerful central nervous system stimulants . Amphetamines have stimulating effects opposite to the effects of depressants such as alcohol, narcotics , and barbiturates . They raise the blood pressure by causing the body to release epinephrine ...
Read more
|
|
|
Wilbur Samuel Jackman
Wilbur Samuel Jackman 1855-1907, American educator, b. Mechanicstown, Ohio, grad. Harvard, 1884. Jackman was a leader of the nature study movement in elementary schools. He taught (after 1889) at the Cook County Normal School in Chicago and, beginning with Nature Study for the Common Schools (189...
Read more
|
|
|
quadrant
quadrant 1 In analytic geometry, one of the four regions of the plane determined by two lines, the x- axis and the y- axis. Commonly these lines are drawn perpendicular to each other, and the quadrants, or regions, they determine are numbered counterclockwise, beginning with the upper right qua...
Read more
|
|
|
trill
trill in music, ornament consisting of the more or less rapid alternation of two adjacent notes. Indicated by any of several conventional symbols, it varies in speed and duration and in the manner of its beginning and ending according to context. Originating in the Renaissance, the trill became t...
Read more
|
|
photon
photon , the particle composing light and other forms of electromagnetic radiation , sometimes called light quantum. The photon has no charge and no mass. About the beginning of the 20th cent., the classical theory that light is emitted and absorbed by matter in a continuous stream came under criti...
Read more
|
