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harmonica

(Encyclopedia)harmonica. 1 The simplest of the musical instruments employing free reeds, known also as the mouth organ or French harp. It was probably invented in 1829 by Friedrich Buschmann of Berlin, who called h...

aspirin

(Encyclopedia)aspirin, acetyl derivative of salicylic acid (see salicylate) that is used to lower fever, relieve pain, reduce inflammation, and thin the blood. Common conditions treated with aspirin include headach...

urea

(Encyclopedia)CE5 urea yo͝oēˈə [key], organic compound that is the principal end product of nitrogen metabolism in most mammals. Urea was the first animal metabolite to be isolated in crystalline form; its c...

dialect

(Encyclopedia)dialect, variety of a language used by a group of speakers within a particular speech community. Every individual speaks a variety of his language, termed an idiolect. Dialects are groups of idiolects...

Planck, Max

(Encyclopedia)Planck, Max mäks plängk [key], 1858–1947, German physicist. Seeking to explain the experimental spectrum (distribution of electromagnetic energy according to wavelength) of blackbody radiation, he...

Schliemann, Heinrich

(Encyclopedia)Schliemann, Heinrich hīnˈrĭkh shlēˈmän [key], 1822–90, German archaeologist, discoverer of the ruins of Troy. He accumulated a fortune in the indigo trade and as a military contractor and reti...

pantheism

(Encyclopedia)pantheism pănˈthēĭzəm [key] [Gr. pan=all, theos=God], name used to denote any system of belief or speculation that includes the teaching “God is all, and all is God.” Pantheism, in other word...

intelligence

(Encyclopedia)intelligence, in psychology, the general mental ability involved in calculating, reasoning, perceiving relationships and analogies, learning quickly, storing and retrieving information, using language...

cobalt, chemical element

(Encyclopedia)cobalt, metallic chemical element; symbol Co; at. no. 27; at. wt. 58.9332; m.p. 1,495℃; b.p. about 2,870℃; sp. gr. 8.9 at 20℃; valence +2 or +3. Cobalt is a silver-white, lustrous, hard, brittle...

Stuart, James Francis Edward

(Encyclopedia)Stuart or Stewart, James Francis Edward, 1688–1766, claimant to the British throne, son of James II and Mary of Modena; called the Old Pretender. His birth, falsely rumored by Whigs at the time to b...