Columbia Encyclopedia

Search results

500 results found

landslide

(Encyclopedia)landslide, rapid slipping of a mass of earth or rock from a higher elevation to a lower level under the influence of gravity and water lubrication. More specifically, rockslides are the rapid downhill...

sociolinguistics

(Encyclopedia)sociolinguistics, the study of language as it affects and is affected by social relations. Sociolinguistics encompasses a broad range of concerns, including bilingualism, pidgin and creole languages, ...

Troy , ancient city, Asian Turkey

(Encyclopedia)Troy, ancient city made famous by Homer's account of the Trojan War. It is also called Ilion or, in Latin, Ilium. Its site is almost universally accepted as the mound now named Hissarlik, in Asian Tur...

Tiahuanaco

(Encyclopedia)Tiahuanaco tyäwänäˈkō [key], ancient native ruin, W Bolivia, 34 mi (55 km) S of Lake Titicaca on the Tiahuanaco R. in the S central Andes, near the Peruvian border; also called Tiwanaku or Tiahua...

urinalysis

(Encyclopedia)urinalysis yo͝orˌənălˈĭsĭs [key], clinical examination of urine for the purpose of medical diagnosis. Urine is initially examined for such characteristics as color, odor, and specific gravity. ...

badger

(Encyclopedia)badger, name for several related members of the weasel family. Most badgers are large, nocturnal, burrowing animals, with broad, heavy bodies, long snouts, large, sharp claws, and long, grizzled fur. ...

central bank

(Encyclopedia)central bank, financial institution designed to regulate and control the money supply of a nation, with the goal of fostering economic growth without inflation. Although central banking systems have v...

reservoir

(Encyclopedia)reservoir rĕzˈəvôr, –vwär [key], storage tank or wholly or partly artificial lake for storing water. Building an embankment or dam to preserve a supply of water for irrigation is an ancient pra...

Quaternary period

(Encyclopedia)Quaternary period kwətûrˈnərē [key], younger of the two geologic periods of the Cenozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table) from 2 millon years ago to t...

hydraulic machine

(Encyclopedia)CE5 Hydraulic pressure: In any hydraulic device the pressure exerted by one piston is transmitted throughout the fluid. Since pressure equals force divided by area, a small force (F1) exerted on a ...