Columbia Encyclopedia

Search results

500 results found

water pollution

(Encyclopedia)water pollution, contamination of water resources by harmful wastes; see also sewerage, water supply, pollution, and environmentalism. The United States has enacted extensive federal legislation to ...

Inca

(Encyclopedia)Inca ĭngˈkə [key], pre-Columbian empire, W South America. The name Inca may specifically refer to the emperor, but is generally used to mean the empire or the people. When Francisco Pizarro lande...

money

(Encyclopedia)money, term that refers to two concepts: the abstract unit of account in terms of which the value of goods, services, and obligations can be compared; and anything that is widely established as a mean...

magnetism

(Encyclopedia)CE5 Lines of induction around a single bar magnet and between opposite poles of different magnets magnetism, force of attraction or repulsion between various substances, especially those made of i...

Luxembourg, grand duchy, W Europe

(Encyclopedia)CE5 Luxembourg lŭkˈsəmbûrg, Ger. lo͝okˈsəmbo͝orkh [key], officially Grand Duchy of Luxembourg, grand duchy (2015 est. pop. 567,000), 998 sq mi (2,586 sq km), W Europe. Roughly triangular, i...

Lithuania

(Encyclopedia)CE5 Lithuania lĭtho͞oāˈnēə [key], Lithuanian Lietuva, officially Republic of Lithuania, republic (2015 est. pop. 2,932,000), 25,174 sq mi (65,201 sq km), N central Europe. Lithuania borders o...

Bulgaria

(Encyclopedia)CE5 Bulgaria bŭlgârˈēə [key], Bulgarian Balgarija, officially Republic of Bulgaria, r...

atom

(Encyclopedia)CE5 Bohr-Rutherford atom CE5 Probability distribution of the electron in the hydrogen atom: A. Ground state B. Highly excited state atom [Gr.,=uncuttable (indivisible)], basic unit of matte...

Estonia

(Encyclopedia)CE5 Estonia ĕstōˈnēə [key], Estonian Eesti, officially Republic of Estonia, republic ...

El Salvador

(Encyclopedia)CE5 El Salvador ĕl sälväᵺōrˈ [key], officially Republic of El Salvador, republic (2021 est. pop. ...