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fermium

(Encyclopedia)fermium fûrˈmēəm [key] [for Enrico Fermi], artificially produced radioactive chemical element; symbol Fm; at. no. 100; mass no. of most stable isotope 257; m.p. 1,527℃; b.p. and sp. gr. unknown;...

lawrencium

(Encyclopedia)lawrencium, artificially produced radioactive chemical element; symbol Lr; at. no. 103; mass number of most stable isotope 262; m.p. about 1,627℃; b.p. and sp. gr. unknown; valence +3. Lawrencium is...

Limburg, province, Belgium

(Encyclopedia)Limburg lĭmˈbûrg, Du. lĭmˈbûrkh [key], Fr. Limbourg, province (1991 pop. 750,435), 930 sq mi (2,409 sq km), NE Belgium, bordering on the Netherlands in the north. The chief cities are Hasselt (t...

Brownian movement

(Encyclopedia)Brownian movement or motion, zigzag, irregular motion exhibited by minute particles of matter when suspended in a fluid. The effect has been observed in all types of colloidal suspensions (see colloid...

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...

cerium

(Encyclopedia)cerium sērˈēəm [key] [from the asteroid Ceres], metallic chemical element; symbol Ce; at. no. 58; at. wt. 140.116; m.p. 799℃; b.p. 3,426℃; sp. gr. 6.77 at 25℃; valence +3 or +4. Cerium is a ...

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...

cinéma vérité

(Encyclopedia)cinéma vérité, a style of filmmaking that attempts to convey candid realism. Often employing lightweight, hand-held cameras and sound equipment, it shows people in everyday situations and uses auth...

Henry the Proud

(Encyclopedia)Henry the Proud, c.1108–1139, duke of Bavaria (1126–38) and of Saxony (1137–38). A member of the Guelph family, he inherited the duchy of Bavaria and enormous private wealth. By his marriage (11...