Columbia Encyclopedia

Search results

185 results found

Hunan

(Encyclopedia)Hunan ho͞oˈnänˈ [key] [south of the lake], province, c.80,000 sq mi (207,254 sq km), S ce...

Yunnan

(Encyclopedia)Yunnan or Yun-nan both: yünˈnän [key] [south of the clouds], province (2010 pop. 45,966,239), c.162,000 sq mi (419,600 sq km), SW China. It borders Myanmar on the west and Laos and Vietnam on the s...

Doppler effect

(Encyclopedia)Doppler effect, change in the wavelength (or frequency) of energy in the form of waves, e.g., sound or light, as a result of motion of either the source or the receiver of the waves; the effect is nam...

Mencken, H. L.

(Encyclopedia)Mencken, H. L. (Henry Louis Mencken) mĕngˈkən, mĕnˈ– [key], 1880–1956, American editor, author, and critic, b. Baltimore, studied at the Baltimore Polytechnic. Probably America's most influen...

poison

(Encyclopedia)poison, any agent that may produce chemically an injurious or deadly effect when introduced into the body in sufficient quantity. Some poisons can be deadly in minute quantities, others only if relati...

Welles, Orson

(Encyclopedia)Welles, Orson, 1915–85, American actor, director, and producer, b. Kenosha, Wis. From childhood he evinced a precocious talent and lofty sense of self-assurance in theatrical matters. He began actin...

ultraviolet radiation

(Encyclopedia)ultraviolet radiation, invisible electromagnetic radiation between visible violet light and X rays; it ranges in wavelength from about 400 to 4 nanometers and in frequency from about 1015 to 1017 hert...

steam engine

(Encyclopedia)CE5 Steam engine steam engine, machine for converting heat energy into mechanical energy using steam as a medium, or working fluid. When water is converted into steam it expands, its volume increa...

planet

(Encyclopedia)planet [Gr.,=wanderer], a large nonluminous body of rock, gas, or ice that orbits the sun or another star, has a rounded shape due to gravity, and has cleared its orbit of smaller objects. The term, o...

vaporization

(Encyclopedia)vaporization, change of a liquid or solid substance to a gas or vapor. There is fundamentally no difference between the terms gas and vapor, but gas is used commonly to describe a substance that appea...