Columbia Encyclopedia

Search results

463 results found

Grosseteste, Robert

(Encyclopedia)Grosseteste, Robert grōsˈtĕst [key], c.1175–1253, English prelate. Educated at Oxford and probably also at Paris, he became one of the most learned men of his time. He taught at Oxford and later,...

amyotrophic lateral sclerosis

(Encyclopedia)amyotrophic lateral sclerosis (ALS) āˌmīətrōfˈik, sklĭrōˈsĭs [key] or motor neuron disease, sometimes called Lou Gehrig's disease, degenerative disease that affects motor neurons in the brai...

induction, in electricity and magnetism

(Encyclopedia)induction, in electricity and magnetism, common name for three distinct phenomena. Electromagnetic induction is the production of an electromotive force (emf) in a conductor as a result of a changing ...

Baraka, Amiri

(Encyclopedia)Baraka, Amiri amērē bəräˈkə [key], 1934–2014, American poet, playwright, and political activist, b. Newark, N.J., as Everett LeRoy Jones, studied at Rutgers Univ., Howard Univ. In college he a...

beach

(Encyclopedia)beach, a gently sloping zone where deposits of unconsolidated sediments are subject to wave action at the shore of an ocean or lake. Most of the sediment making up a beach is supplied by rivers or by ...

butter

(Encyclopedia)butter, dairy product obtained by churning the fat from milk until it solidifies. In most areas the milk of cows is the basis, but elsewhere that of goats, sheep, and mares has been used. Butter was k...

Mirabeau, Honoré Gabriel Riquetti, comte de

(Encyclopedia)Mirabeau, Honoré Gabriel Riquetti or Riqueti, comte de ōnôrāˈ gäbrēĕlˈ rēkĕtēˈ kôNt də mēräbōˈ [key], 1749–91, French revolutionary and political leader; son of Victor de Mirabeau...

Madrid, city, Spain

(Encyclopedia)Madrid mədrĭdˈ, Span. mäᵺhrēᵺˈ [key], city (1990 pop. 3,120,732), capital of Spain and of the autonomous community and prov. of Madrid, central Spain, on the Manzanares River. The newest of ...

Hearst, William Randolph

(Encyclopedia)Hearst, William Randolph, 1863–1951, American journalist and publisher, b. San Francisco. A flamboyant, highly controversial figure, Hearst was nonetheless an intelligent and extremely competent new...

Edison, Thomas Alva

(Encyclopedia)Edison, Thomas Alva, 1847–1931, American inventor, b. Milan, Ohio. A genius in the practical application of scientific principles, Edison was one of the greatest and most productive inventors of his...