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Salvador, city, Brazil

(Encyclopedia)Salvador souN [key], city (1991 pop. 2,075,273), capital of Bahia state, E Brazil, a port on the Atlantic Ocean. It is the commercial center of a fertile crescent (the Recôncavo) and a shipping point...

symmetry

(Encyclopedia)symmetry, generally speaking, a balance or correspondence between various parts of an object; the term symmetry is used both in the arts and in the sciences. In art and design, it is often used in a s...

technetium

(Encyclopedia)technetium tĕknēˈshēəm [key] [Gr. technetos=artificial], artificially produced radioactive chemical element; symbol Tc; at. no. 43; mass no. of most stable isotope 98; m.p. 2,200℃; b.p. 4,877�...

bubble chamber

(Encyclopedia)bubble chamber, device for detecting charged particles and other radiation by means of tracks of bubbles left in a chamber filled with liquid hydrogen or other liquefied gas. It was invented in 1952 b...

cave

(Encyclopedia)cave, a cavity in the earth's surface usually large enough for a person to enter. Caves may be formed by the chemical and mechanical action of a stream upon soluble or soft rock, of rainwater seeping ...

Michelangelo Buonarroti

(Encyclopedia)Michelangelo Buonarroti mīkəlănˈjəlō, Ital. mēkālänˈjālō bwōnär-rôˈtē [key], 1475–1564, Italian sculptor, painter, architect, and poet, b. Caprese, Tuscany. In his architectura...

Freud, Sigmund

(Encyclopedia)Freud, Sigmund froid [key], 1856–1939, Austrian psychiatrist, founder of psychoanalysis. Born in Moravia, he lived most of his life in Vienna, receiving his medical degree from the Univ. of Vienna i...

chemical bond

(Encyclopedia)chemical bond, mechanism whereby atoms combine to form molecules. There is a chemical bond between two atoms or groups of atoms when the forces acting between them are strong enough to lead to the for...

Heath, Sir Edward Richard George

(Encyclopedia)Heath, Sir Edward Richard George, 1916–2005, British statesman. Educated at Oxford, he served in the Royal Artillery during World War II, rising to the rank of colonel. He was elected to Parliament ...

Etruscan art

(Encyclopedia)Etruscan art ĭtrŭsˈkən [key], the art of the inhabitants of ancient Etruria, which, by the 8th cent. b.c., incorporated the area in Italy from Salerno to the Tiber River (see Etruscan civilization...