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Rotterdam, city, Netherlands

(Encyclopedia)Rotterdam rŏtˈərdămˌ, Dutch rôtərdämˈ [key], city (1994 pop. 598,521), South Holland prov., W Netherlands, on the Nieuwe Maas (New Meuse) River near its mouth on the North Sea. One of the lar...

sunspots

(Encyclopedia)sunspots, dark, usually irregularly shaped spots on the sun's surface that are actually solar magnetic storms. The spots are darker because the temperature of the spots is lower than that of the surro...

Marseilles

(Encyclopedia)Marseilles märsāˈ [key], Fr. Marseille, city (1990 pop. 807,726), capital of Bouches-du-Rhône dept., SE France, on the Gulf of Lions, an arm of the Mediterranean Sea. It is the second largest city...

Hamburg, city, Germany

(Encyclopedia)Hamburg hämˈbo͝orkh [key], officially Freie und Hansestadt Hamburg (Free and Hanseatic Cit...

Cologne

(Encyclopedia)Cologne kəlōnˈ [key], Ger. Köln, city (2021 est. metro area pop. 1,129,000), North Rhine�...

city

(Encyclopedia)city, densely populated urban center, larger than a village or a town, whose inhabitants are engaged primarily in commerce and industry. In the United States a city is legally an incorporated municipa...

Vanderbilt, Cornelius

(Encyclopedia)Vanderbilt, Cornelius, 1794–1877, American railroad magnate, b. Staten Island, N.Y. As a boy he ferried freight and passengers from Staten Island to Manhattan, and he soon gained control of most of ...

Panama Canal

(Encyclopedia)Panama Canal, waterway across the Isthmus of Panama, connecting the Atlantic (by way of the Caribbean Sea) and Pacific oceans, built by the United States (1904–14, on territory leased from the repub...

air navigation

(Encyclopedia)air navigation, science and technology of determining the position of an aircraft with respect to the surface of the earth and accurately maintaining a desired course (see navigation). Basic to air ...

Macau

(Encyclopedia)Macau or Macao məkouˈ [key], Port. Macau, Mandarin Aomen, special administrative region of China, formerly administered by Portugal (2015 est. pop. 601,000), 10.8 sq mi (28.2 sq km), adjoining Guang...