Columbia Encyclopedia

Search results

500 results found

year

(Encyclopedia)year, time required for the earth to complete one orbit about the sun. The solar or tropical year is measured relative to the sun and is equal to 365 days, 5 hr, 48 min, 46 sec of mean solar time (see...

Warren, Mercy Otis

(Encyclopedia)Warren, Mercy Otis, 1728–1814, American writer, b. Barnstable, Mass.; sister of James Otis and wife of James Warren, who was speaker of the Massachusetts house of representatives. An ardent patriot,...

weber, unit of magnetic flux

(Encyclopedia)weber vāˈbər, wē–, wĕbˈər [key] [for W. E. Weber], abbr. Wb, unit of magnetic flux in the mks system of weights and measures; 1 Wb is equal to 1 volt-second. The weber per square meter, calle...

celestial pole

(Encyclopedia)celestial pole, one of the two points at which the earth's axis of rotation intersects the celestial sphere. The celestial pole is important as a reference point in the equatorial coordinate system; t...

safety movement

(Encyclopedia)safety movement, widespread effort to prevent accidents that followed the increasing number of casualties in industry, traffic and transportation, and homes arising out of the Industrial Revolution an...

privateering

(Encyclopedia)privateering, former usage of war permitting privately owned and operated war vessels (privateers) under commission of a belligerent government to capture enemy shipping. Private ownership distinguish...

Kennedy, Joseph Patrick

(Encyclopedia)Kennedy, Joseph Patrick, 1888–1969, U.S. ambassador to Great Britain (1937–40), b. Boston, grad. Harvard, 1912. The founder of an American dynasty, he was the father of nine children, including Jo...

Kepler's laws

(Encyclopedia)CE5 Schematic representation of Kepler's second law: The areas ABF and A′B′F′ are equal and are swept out in equal intervals of time by a planet orbiting around the sun (at F). Kepler's laws...

Danube

(Encyclopedia)Danube dănˈyo͞ob [key], Czech Dunaj, Ger. Donau, Hung. Duna, Rom. Dunarea, Serbo-Croatian and Bulg. Dunav, Ukr. Dunay, great river of central and SE Europe, c.1,770 mi (2,850 km) long, with a drain...

Lowell, Josephine Shaw

(Encyclopedia)Lowell, Josephine Shaw, 1843–1905, American political reformer, b. Roxbury, Mass. Lowell, brother of Robert Gould Shaw and widow of Colonel Charle...