Columbia Encyclopedia

Search results

500 results found

color index

(Encyclopedia)color index, in astronomy, difference in an object's brightness as recorded between any two well-defined bands of the electromagnetic spectrum by using optical filters of different colors. If blue and...

cloisonné

(Encyclopedia)cloisonné kloizənāˈ, –sənāˈ [key], method of enamel decoration of metal surfaces, such as vases and jewel boxes. Metal filaments (which form the cloisons or separating elements) are attached ...

shock wave

(Encyclopedia)shock wave, wave formed of a zone of extremely high pressure within a fluid, especially the atmosphere, that propagates through the fluid at a speed in excess of the speed of sound. A shock wave is ca...

Point Barrow

(Encyclopedia)Point Barrow, northernmost point of Alaska, on the Arctic Ocean, at lat. 71°23′N and long. 156°30′W. Visited in 1826 by Frederick W. Beechey, a British explorer, and named by him for the British...

phenomenon

(Encyclopedia)phenomenon, an observable fact or event; in philosophy the definitions and uses of the term have varied. In the philosophy of Aristotle phenomena were the objects of the senses (e.g., sights and sound...

Yesenin, Sergei Aleksandrovich

(Encyclopedia)Yesenin, Sergei Aleksandrovich syĭrgāˈ əlyĭksänˈdrəvĭch yĭsyāˈnĭn [key], 1895–1925, Russian poet. Yesenin was the most popular poet of the early revolution and the object of a considera...

Buridan, Jean

(Encyclopedia)Buridan, Jean byo͝orˈĭdən, Fr. zhäN bürēdäNˈ [key], d. c.1358, French scholastic philosopher. Rector of the Univ. of Paris, he was a follower of William of Occam and a nominalist. Buridan pro...

meteor

(Encyclopedia)meteor, appearance of a small particle flying through space that interacts with the earth's upper atmosphere. While still outside the atmosphere, the particle is known as a meteoroid. Countless meteor...

McCarthy, Joseph Raymond

(Encyclopedia)McCarthy, Joseph Raymond, 1908–57, U.S. senator from Wisconsin (1947–57), b. near Appleton, Wis. He practiced law in Wisconsin and became (1940) a circuit judge. He served with the U.S. marines in...

Assange, Julian Paul

(Encyclopedia)Assange, Julian Paul äsänjˈ [key], 1971–, Australian Internet journalist and activist, founder of WikiLeaks, a whistleblower website that publishes documents and imag...