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acids and bases

(Encyclopedia)acids and bases, two related classes of chemicals; the members of each class have a number of common properties when dissolved in a solvent, usually water. Another theory that provides a very broad ...

permutations and combinations

(Encyclopedia)permutations and combinations: see probability. ...

orchestra and orchestration

(Encyclopedia)CE5 Typical seating plan of a symphony orchestra orchestra and orchestration, an orchestra is a musical ensemble of mixed instruments based on strings and winds, under the direction of a conductor...

visit and search

(Encyclopedia)visit and search: see search, right of. ...

Mortimer, Roger de, 4th earl of March and 2d earl of Ulster

(Encyclopedia)Mortimer, Roger de, 4th earl of March and 2d earl of Ulster, 1374–98, English nobleman. He succeeded (1381) his father, Edmund de Mortimer, 3d earl of March, and was brought up as a royal ward. In 1...

Taylor, Alan John Percivale

(Encyclopedia)Taylor, Alan John Percivale, 1906–90, English historian, primarily interested in diplomatic and Central European history. Educated at Oxford, he became a fellow of Magdalen College in 1938. He appea...

Azawakh

(Encyclopedia)Azawakh, breed of long-legged, swift hound from the Sahel region of West Africa, particularly Burkino Faso, Mali, and Niger. Slim and elegant with a narrow, chiseled head, it stands from 23 to 29 in. ...

abracadabra

(Encyclopedia)abracadabra ăbˌrəkədăbˈrə [key], magical formula used by the Gnostics (see Gnosticism) to invoke the aid of benevolent spirits to ward off disease and affliction. It is supposed to be derived f...

Janus, in Roman religion

(Encyclopedia)Janus jāˈnəs [key], in Roman religion, god of beginnings. He was one of the principal Roman gods, the custodian of the universe. The first hour of the day, the first day of the month, the first mon...

Budgell, Eustace

(Encyclopedia)Budgell, Eustace bŭjˈəl [key], 1686–1737, English essayist. He was a cousin of Addison, through whose aid he obtained several public offices. Budgell contributed to the Tatler, the Spectator, the...