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Ptolemaic system
(Encyclopedia)Ptolemaic system tŏlˌəmāˈĭk [key], historically the most influential of the geocentric cosmological theories, i.e., theories that placed the earth motionless at the center of the universe with a...Organization of American States
(Encyclopedia)Organization of American States (OAS), international organization, created Apr. 30, 1948, at Bogotá, Colombia, by agreement of Argentina, Bolivia, Brazil, Chile, Colombia, Costa Rica, the Dominican R...Palau
(Encyclopedia)Palau pälouˈ [key], officially Republic of Palau, independent nation (2015 est. pop. 21,000), c.192 sq mi (497 sq km), W Pacific, in the W Caroline Islands. Belau, the indigenous name for Palau, is ...Otto I, Holy Roman emperor
(Encyclopedia)Otto I or Otto the Great, 912–73, Holy Roman emperor (962–73) and German king (936–73), son and successor of Henry I of Germany. He is often regarded as the founder of the Holy Roman Empire. Bol...Buffalo, city, United States
(Encyclopedia)Buffalo, city (2020 pop. 278,349), seat of Erie co., W N.Y., on Lake Erie and the Niagara and Buffalo rivers; inc. 1832. With more than 37 mi (60 km) of...Pan-Americanism
(Encyclopedia)Pan-Americanism, movement toward commercial, social, economic, military, and political cooperation among the nations of North, Central, and South America. In the early 20th cent., U.S. manipulation ...Triple Alliance and Triple Entente
(Encyclopedia)Triple Alliance and Triple Entente äntäntˈ [key], two international combinations of states that dominated the diplomatic history of Western Europe from 1882 until they came into armed conflict in W...United Arab Emirates
(Encyclopedia) CE5 United Arab Emirates, federation of sheikhdoms (2015 est. pop. 5,780,000), c.30,000 sq mi (77,700 sq km), SE Arabia, on the Persian Gulf and the Gulf of Oman. The federation, commonly known as ...Somalia
(Encyclopedia) CE5 Somalia sōmäˈleə [key], officially Federal Republic of Somalia, country (2015 est. pop. 10,616,000), 246,200 sq mi (637,657 sq km), extreme E Africa. It is directly south of the Arabian pen...Laos
(Encyclopedia) CE5 Laos läˈōs [key], officially Lao People's Democratic Republic, republic (2015 est. pop. 6,664,000), 91,428 sq mi (236,800 sq km), SE Asia. A landlocked nation, Laos is bordered by China on t...Browse by Subject
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