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map

(Encyclopedia)map, conventionalized representation of spatial phenomena on a plane surface. Unlike photographs, maps are selective and may be prepared to show various quantitative and qualitative facts, including b...

lighting

(Encyclopedia)CE5 Incandescent lamp CE5 Basic fluorescent lamp lighting, light produced by artificial means to allow visibility in enclosures and at night. For stage lighting, see scene design and stage ligh...

dialysis

(Encyclopedia)dialysis dīălˈĭsĭs [key], in chemistry, transfer of solute (dissolved solids) across a semipermeable membrane. Strictly speaking, dialysis refers only to the transfer of the solute; transfer of t...

Colombo

(Encyclopedia)Colombo kəlŭmˈbō [key], largest city (2021 est. metro area pop. 619,000) and former capi...

garden

(Encyclopedia)garden, land set aside for the cultivation of flowers, herbs, vegetables, or small fruits, for either utility or ornament. Gardens range in size from window boxes and small dooryard plots to the publi...

space medicine

(Encyclopedia)space medicine, study of the medical and biological effects of space travel on living organisms. The principal aim is to discover how well and for how long humans can withstand the extreme conditions ...

Kennan, George Frost

(Encyclopedia)Kennan, George Frost, 1904–2005, U.S. diplomat and historian, b. Milwaukee, Wis., grad. Princeton, 1925. A brilliant strategist and among the most influential and intellectual Americans in the 20th-...

sailing

(Encyclopedia)sailing, as a sport, the art of navigating a sailboat for recreational or competitive purposes. Although sailing as a means of transportation predates history, sport sailing—or yachting—seems to...

capitalism

(Encyclopedia)capitalism, economic system based on private ownership of the means of production, in which personal profit can be acquired through investment of capital and employment of labor. Capitalism is grounde...

arrhythmia

(Encyclopedia)arrhythmia ārĭᵺˈmēə [key], disturbance in the rate or rhythm of the heartbeat. Various arrhythmias can be symptoms of serious heart disorders; however, they are usually of no medical significan...