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Gatchina

(Encyclopedia)Gatchina gäˈchēnə [key], city (1989 pop. 80,000), NW European Russia. The city developed around the imperial palace (built 1766–81), which was used as a summer residence by Paul I in the 18th ce...

Dothan, city, United States

(Encyclopedia)Dothan dōˈthən [key], city (2020 pop. 71,072), seat of Houston co., SE Ala., near the Fla....

Savannah, river, United States

(Encyclopedia)Savannah, river, 314 mi (505 km) long, formed by the confluence of the Tugaloo and Seneca rivers and flowing SE to the Atlantic Ocean; with the Tugaloo it forms the entire S.C.–Ga. boundary. Savanna...

Woomera

(Encyclopedia)Woomera wo͞oˈmərə [key], village (2016 pop. 146), South Australia, S Australia, near Lake Torrens. It is located within the large Woomera Range Complex, which includes and air force and missile-te...

civil defense

(Encyclopedia)civil defense, nonmilitary activities designed to protect civilians and their property from enemy actions in time of war. A civil defense program usually includes measures taken during peace (e.g., bu...

Vajpayee, Atal Bihari

(Encyclopedia)Vajpayee, Atal Bihari äˈtäl bihärˈē väjˈpīˌ [key], 1926–2018, Indian politician, prime minister of India (1996, 1998–2004). He began his career as a journalist, entering politics as an u...

Mottelson, Benjamin Roy

(Encyclopedia)Mottelson, Benjamin Roy, 1926–, Danish physicist, b. Chicago, Ph.D. Harvard, 1950. Raised and educated in the United States, he moved to Denmark, where he began work as a nuclear physicist. Mottelso...

inorganic chemistry

(Encyclopedia)inorganic chemistry, the study of all the elements and their compounds with the exception of carbon and its compounds, which fall under the category of organic chemistry. Inorganic chemistry investiga...

deuterium

(Encyclopedia)deuterium do͞otērˈēəm [key], isotope of hydrogen with mass no. 2. The deuterium nucleus, called a deuteron, contains one proton and one neutron. Deuterium is also called heavy hydrogen, and water...

Rice University

(Encyclopedia)Rice University, at Houston, Tex.; coeducational; chartered 1891 as Rice Institute through a bequest of William Marsh Rice, opened 1912, renamed 1960. It follows the residential college system and has...