Columbia Encyclopedia

(Encyclopedia) states of matter, forms of matter differing in several properties because of differences in the motions and forces of the molecules (or atoms, ions, or elementary particles) of which they are composed...

(Encyclopedia) commune kômˈyo͞on [key], in medieval history, collective institution that developed in continental Europe after the fall of the Roman Empire. Because of the importance of the commune in municipal g...

(Encyclopedia) Iran-Iraq War, 1980–88, protracted military conflict between Iran and Iraq. It officially began on Sept. 22, 1980, with an Iraqi land and air invasion of western Iran, although Iraqi spokespersons m...

(Encyclopedia) Platt, Orville Hitchcock, 1827–1905, U.S. Senator (1879–1905), b. Washington, Litchfield co., Conn. Platt held many public offices in Connecticut before he served in the U.S. Senate. He helped fra...

(Encyclopedia) cremation, disposal of a corpse by fire. It is an ancient and widespread practice, second only to burial. It has been found among the tribes of the Pacific Northwest, among Northern Athapascan bands i...

(Encyclopedia) water power, mechanical energy derived from falling or flowing water, e.g., rivers, streams, and the overflow of dams. The wooden water wheel, long utilized for driving machinery in flour mills and fa...

(Encyclopedia) Chamorro, Emiliano āmēlyäˈnō chämōˈrō [key], 1871–1966, president of Nicaragua (1917–20, 1926). A conservative army chief, Chamorro supported the revolt (1909) against José Santos Zelaya...

(Encyclopedia) United Irishmen or United Irish Society, Irish political organization. It was founded at Belfast in 1791 by Theobald Wolfe Tone. Disgruntled by the use of English patronage to control Irish politics, ...

(Encyclopedia) Knickerbocker nĭkˈərbŏkˌər [key], term used almost synonymously with the adjective “Dutch” in respect to Dutch families and customs and the Dutch region of early New York state. A History of...

(Encyclopedia) De Maria, Walter Joseph, 1935–2013, American sculptor, b. Albany, Calif. From the late 1950s into the 60s De Maria partcipated in “Happenings,” created Dada-influenced minimalist sculptures, and...