Columbia Encyclopedia

Search results

500 results found

photocopying

(Encyclopedia)photocopying, process whereby written or printed matter is directly copied by photographic techniques. Generally, photocopying is practical when just a few copies of an original are needed. When many ...

Ottawa, city, Canada

(Encyclopedia)Ottawa ŏtˈəwə [key], city (1991 pop. 313,987), capital of Canada, SE Ont., at the confluence of the Ottawa and Rideau rivers and across the Ottawa from Gatineau, Que. The Rideau Canal separates th...

navigation satellite

(Encyclopedia)navigation satellite, artificial satellite designed expressly to aid the navigation of sea and air traffic. Early navigation satellites, from the Transit series launched in 1960 to the U.S. navy's Nav...

Van Allen radiation belts

(Encyclopedia)CE5 Van Allen radiation belts: The solar wind, a stream of protons, electrons, and ions coming from the sun, gives the belts their asymmetrical shape. Van Allen radiation belts, belts of radiation...

Bruno, Giordano

(Encyclopedia)Bruno, Giordano jōrdäˈnō bro͞oˈnō [key], 1548–1600, Italian philosopher, b. Nola. The son of a professional soldier, he entered the Dominican order early in his youth and was ordained a pries...

mosque

(Encyclopedia)mosque mŏsk [key], building for worship used by members of the Islamic faith. Muhammad's house in Medina (a.d. 622), with its surrounding courtyard and hall with columns, became the prototype for the...

liquefaction

(Encyclopedia)liquefaction, change of a substance from the solid or the gaseous state to the liquid state. Since the different states of matter correspond to different amounts of energy of the molecules making up t...

Miłosz, Czesław

(Encyclopedia)Miłosz, Czesław chĕsˈwäf mēˈwŏsh [key], 1911–2004, poet, essayist, and novelist, b. Szetejnie, Lithuania (then in Russia). Widely considered the greatest contemporary Polish poet, Miłosz wa...

icon

(Encyclopedia)icon [Gr. eikon=image], single image created as a focal point of religious veneration, especially a painted or carved portable object of the Orthodox Eastern faith. Icons commonly represent Christ Pan...

communications satellite

(Encyclopedia)communications satellite artificial satellite that functions as part of a global radio-communications network. Echo 1, the first communications satellite, launched in 1960, was an instrumented inflat...