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computer virus

(Encyclopedia)computer virus, rogue computer program, typically a short program designed to disperse copies of itself to other computers and disrupt those computers' normal operations. A computer virus usually atta...

isotope

(Encyclopedia)CE5 Isotopes of hydrogen isotope īˈsətōp [key], in chemistry and physics, one of two or more atoms having the same atomic number but differing in atomic weight and mass number. The concept of ...

radiation sickness

(Encyclopedia)radiation sickness, harmful effect produced on body tissues by exposure to radioactive substances. The biological action of radiation is not fully understood, but it is believed that a disturbance in ...

Giap, Vo Nguyen

(Encyclopedia)Giap, Vo Nguyen vô nəwēˈĕn zhäp [key], 1911–2013, Vietnamese military leader and government official whose strategies helped drive the forces of Japan, France, and the United States from Vietn...

Guevara, Che

(Encyclopedia)Guevara, Che (Ernesto Guevara) chā gāväˈrä, ārnĕsˈtō [key], 1928–67, Cuban revolutionary and political leader, b. Argentina. Trained as a physician at the Univ. of Buenos Aires, he took par...

Asturias

(Encyclopedia)Asturias ästo͞oˈryäs [key], autonomous community and coextensive prov., 4,093 sq mi (10,602 sq km), and former kingdom, NW Spain, S of the Bay of Biscay and E of Galic...

Neustria

(Encyclopedia)Neustria no͞osˈtrēə [key], western portion of the kingdom of the Franks in the 6th, 7th, and 8th cent., during the rule of the Merovingians. It comprised the Seine and Loire country and the region...

Vehmgericht

(Encyclopedia)Vehmgericht fāˈmĭk [key], in medieval Germany, a type of criminal tribunal. The inability of the Holy Roman emperors to exercise effective central control over their lands and the extensive feudal ...

Ten Years War

(Encyclopedia)Ten Years War, 1868–78, struggle for Cuban independence from Spain. Discontent was caused in Cuba by excessive taxation, trade restrictions, and virtual exclusion of native Cubans from governmental ...

Italian Wars

(Encyclopedia)Italian Wars, 1494–1559, series of regional wars brought on by the efforts of the great European powers to control the small independent states of Italy. Renaissance Italy was split into numerous ri...