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volcano

(Encyclopedia) volcano, vents or fissures in the earth's crust through which gases, molten rock, or lava, and solid fragments are discharged. Their study is called volcanology. The term volcano is…

settlement house

(Encyclopedia) settlement house, neighborhood welfare institution generally in an urban slum area, where trained workers endeavor to improve social conditions, particularly by providing community…

polymerase chain reaction

(Encyclopedia) polymerase chain reactionpolymerase chain reactionpŏlˈĭmərāsˌ [key] (PCR), laboratory process in which a particular DNA segment from a mixture of DNA chains is rapidly replicated,…

Kedah

(Encyclopedia) KedahKedahkĕˈdə, kāˈdä [key], state (1991 pop. 1,304,800), 3,660 sq mi (9,479 sq km), central Malay Peninsula, Malaysia, on the Strait of Malacca. It is bordered on the N and NE by…

Etruscan art

(Encyclopedia) Etruscan artEtruscan artĭtrŭsˈkən [key], the art of the inhabitants of ancient Etruria, which, by the 8th cent. b.c., incorporated the area in Italy from Salerno to the Tiber River (…

lobbying

(Encyclopedia) lobbying, practice and profession of influencing governmental decisions, carried out by agents who present the concerns of special interests to legislators and administrators. The term…

Nietzsche, Friedrich Wilhelm

(Encyclopedia) Nietzsche, Friedrich WilhelmNietzsche, Friedrich Wilhelmfrēˈdrĭkh vĭlˈhĕlm nēˈchə [key], 1844–1900, German philosopher, b. Röcken, Prussia. The son of a clergyman, Nietzsche studied…

Northern Territory

(Encyclopedia) Northern Territory, territory (2016 pop. 228,833), 520,280 sq mi (1,347,525 sq km), N central Australia. It is bounded on the N by the Timor Sea, the Arafura Sea, and the Gulf of…

memory, in psychology

(Encyclopedia) memory, in psychology, the storing of learned information, and the ability to recall that which has been stored. It has been hypothesized that three processes occur in remembering:…

conscription

(Encyclopedia) conscription, compulsory enrollment of personnel for service in the armed forces. Obligatory service in the armed forces has existed since ancient times in many cultures, including the…