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• Jean Bernard Leon Foucault (noun)
  1. 1819-1868 french physicist who determined the speed of light and showed that it travels slower in water than in air; invented the Foucault pendulum and the gyroscope
• Juan Ponce de Leon (noun)
  1. 1460-1521 spanish explorer who accompanied Columbus on his second trip in 1493; in 1513 he discovered Florida while searching for the legendary Fountain of Youth
• Leon Battista Alberti (noun)
  1. 1404-1472 italian architect and painter; pioneering theoretician of Renaissance architecture
• Leon Trotsky (noun)
  1. 1879-1940 russian revolutionary and Communist theorist who helped Lenin and built up the army; he was ousted from the Communist Party by Stalin and eventually assassinated in Mexico
• Ponce de Leon (noun)
  1. 1460-1521 spanish explorer who accompanied Columbus on his second trip in 1493; in 1513 he discovered Florida while searching for the legendary Fountain of Youth
• Trotsky, Leon
  1. (1879-1940) a Russian political leader, born in Ukraine, who had an important part in the RUSSIAN REVOLUTION of 1917. He was also a writer on Communism and he believed in REVOLUTION by workers all over the world. He lost power when his enemy STALIN took control of Russia after the death of LENIN (1924), and he was later forced to leave the country. He was eventually murdered in Mexico on the orders of STALIN.
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