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voltaic cell

(Encyclopedia)voltaic cell, a simple device with which chemical energy is converted into electrical energy. Two dissimilar metals (e.g., copper and zinc) are immersed in an electrolyte (e.g., a dissolved sulfate). ...

Casal, Julián del

(Encyclopedia)Casal, Julián del ho͞olyänˈ dĕl käsälˈ [key], 1863–93, Cuban poet, b. Havana. A friend of Rubén Darío, Casal became a leader in modernismo. He was greatly influenced by the French Parnassi...

Wright, Jim

(Encyclopedia)Wright, Jim (James Claud Wright, Jr.), 1922–2015, U.S. congressman, speaker of the U.S. House of Representatives (1987–89), b. Fort Worth, Tex. Following service in the U.S. army during World War ...

Yakub I

(Encyclopedia)Yakub I yäko͝obˈ [key], 1160?–1199, ruler of Morocco (1184–99) and Moorish Spain. He was known as Yakub al-Mansur [the victorious] after his victory over Alfonso VIII of Castile at Alarcos (119...

Tarik ibn Ziyad

(Encyclopedia)Tarik ibn Ziyad täˈrĭk [key], fl. 711, Berber leader of the Muslim invaders of Spain. When the heirs of the Visigothic king, Witiza, requested help from the Moors of N Africa against the usurper Ro...

Suttner, Bertha (Gräfin Kinsky), Freifrau von

(Encyclopedia)Suttner, Bertha (Gräfin Kinsky), Freifrau von bĕrˈtä, grāfˈĭn kĭnsˈkē, frīˈfrou fən zo͝otˈnər [key], 1843–1914, Austrian novelist, known chiefly as an ardent pacifist. Her pacifist n...

Zimbalist, Efrem

(Encyclopedia)Zimbalist, Efrem ĕˈfrəm zĭmˈbəlĭst [key], 1889–1985, Russian-American violinist. Zimbalist was a pupil of Leopold Auer at the St. Petersburg Conservatory. He made his debut in Berlin in 1907,...

beryl

(Encyclopedia)beryl bĕrˈĭl [key], mineral, a silicate of beryllium and aluminum, Be3Al2Si6O18, extremely hard, occurring in hexagonal crystals that may be of enormous size and are usually white, yellow, green, b...

Libya

(Encyclopedia)CE5 Libya lĭbˈēə [key], republic (2015 est. pop. 6,235,000), 679,358 sq mi (1,759,540 sq km), N Africa. It borders on Algeria in the west, on Tunisia in the northwest, on the Mediterranean Sea ...

Malcolm X

(Encyclopedia)Malcolm X, 1925–65, militant black leader in the United States, also known as El-Hajj Malik El-Shabazz, b. Malcolm Little in Omaha, Neb. A petty crimi...