Columbia Encyclopedia

Search results

500 results found

commutator

(Encyclopedia)commutator, device used in an electric generator to convert the alternating current produced in the generator into direct current before the current is sent into an external circuit; it is basically a...

engine

(Encyclopedia)engine: see diesel engine; internal-combustion engine; steam engine; rotary engine; automobile. ...

Hill, Sir Rowland

(Encyclopedia)Hill, Sir Rowland, 1795–1879, English educator, inventor, and postal reformer. He introduced the system of self-government in his school at Hazelwood in Birmingham. In his Plans for the Government a...

barrel organ

(Encyclopedia)barrel organ, mechanical musical instrument requiring nothing but the regular rotary motion of a handle to keep it going. It probably originated at the beginning of the 18th cent., and was once used e...

Foursquare Gospel, International Church of the

(Encyclopedia)Foursquare Gospel, International Church of the, fundamentalist Christian Church and evangelistic missionary body organized in California by Aimee Semple McPherson and Minnie Kennedy in 1927. It derive...

International Bank for Reconstruction and Development

(Encyclopedia)International Bank for Reconstruction and Development (IBRD) (IBRD), independent specialized agency of the United Nations, with headquarters at Washington, D.C.; one of five closely associated develop...

International Campaign to Abolish Nuclear Weapons

(Encyclopedia)International Campaign to Abolish Nuclear Weapons (ICAN), coalition of nongovernmental organizations that was formed in 2007 to advocate for the banning of nuclear weapons. It is based in Geneva, Swit...

Browse by Subject