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Plekhanov, Georgi Valentinovich

(Encyclopedia)Plekhanov, Georgi Valentinovich gāôrˈgē vəlyĭntyēˈnəvĭch plyĭkhäˈnəf [key], 1857–1918, Russian revolutionary and social philosopher. He was a leader in introducing Marxist theory to Ru...

Proudhon, Pierre Joseph

(Encyclopedia)Proudhon, Pierre Joseph pyĕr zhôzĕfˈ pro͞odhôNˈ [key], 1809–65, French social theorist. Of a poor family, Proudhon won an education through scholarships. Much of his later life was spent in p...

life

(Encyclopedia)life, although there is no universal agreement as to a definition of life, its biological manifestations are generally considered to be organization, metabolism, growth, irritability, adaptation, and ...

Almagro, Diego de

(Encyclopedia)Almagro, Diego de dyāˈgō dā älmäˈgrō [key], c.1475–1538, Spanish conquistador, a leader in the conquest of Peru. A partner of Francisco Pizarro, he took part in the first (1524) and second (...

Dmitri

(Encyclopedia)Dmitri dĭmēˈtrēəs [key], 1582–91, czarevich, son of Ivan IV (Ivan the Terrible) of Russia. His brother, Feodor I, succeeded Ivan in 1584, but Boris Godunov actually ruled Russia for the period ...

cycad

(Encyclopedia)cycad sīˈkăd [key], any plant of the order Cycadales, tropical and subtropical palmlike evergreens. The cycads, ginkgoes, and conifers comprise the three major orders of gymnosperms, or cone-bearin...

Ezra, book of the Bible

(Encyclopedia)Ezra, book of the Bible, combined with Nehemiah in the Septuagint to form the book 2 Esdras. In the Vulgate, Ezra and Nehemiah are called 1 and 2 Esdras respectively. Ezra, like Nehemiah, is the work ...

infinity

(Encyclopedia)infinity, in mathematics, that which is not finite; it is often indicated by the symbol ∞. A sequence of numbers, a1, a2, a3, … , is said to “approach infinity” if the numbers eventually b...

hajj

(Encyclopedia)hajj häj [key], the pilgrimage to Mecca, Saudi Arabia, one of the five basic requirements (arkan or “pillars”) of Islam. Its annual observance corresponds to the major holy day id al-adha, itself...

Froude, James Anthony

(Encyclopedia)Froude, James Anthony fro͞od [key], 1818–94, English historian. Educated at Oxford, he took deacon's orders after coming under the influence of the Oxford movement, but he later abandoned the path ...