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statistical mechanics

(Encyclopedia)statistical mechanics, quantitative study of systems consisting of a large number of interacting elements, such as the atoms or molecules of a solid, liquid, or gas, or the individual quanta of light ...

Hindenburg, Paul von

(Encyclopedia)Hindenburg, Paul von hĭnˈdənbûrg, Ger. poul fən hĭnˈdənbo͝ork [key], 1847–1934, German field marshal and president (1925–34), b. Poznan (then in Prussia). His full name was Paul Ludwig Ha...

logical positivism

(Encyclopedia)logical positivism, also known as logical or scientific empiricism, modern school of philosophy that attempted to introduce the methodology and precision of mathematics and the natural sciences into t...

nickel

(Encyclopedia)nickel, metallic chemical element; symbol Ni; at. no. 28; at. wt. 58.6934; m.p. about 1,453℃; b.p. about 2,732℃; sp. gr. 8.902 at 25℃; valence 0, +1, +2, +3, or +4. Nickel is a hard, malleable, ...

semantics

(Encyclopedia)semantics [Gr.,=significant] in general, the study of the relationship between words and meanings. The empirical study of word meanings and sentence meanings in existing languages is a branch of lingu...

Bauhaus

(Encyclopedia)Bauhaus bouˈhous [key], artists' collective and school of art and architecture in Germany (1919–33). The Bauhaus revolutionized art training by combining the teaching of classic arts with the study...

illustration

(Encyclopedia)illustration, any type of picture or decoration used in conjunction with a text to embellish its appearance or to clarify its meaning. Illustration is as old as writing, with both originating in the p...

Marx, Karl

(Encyclopedia)Marx, Karl, 1818–83, German social philosopher, the chief theorist of modern socialism and communism. In 1847 Marx joined the Communist League and with Engels wrote for it the famous Communist M...

Trent, Council of

(Encyclopedia)Trent, Council of, 1545–47, 1551–52, 1562–63, 19th ecumenical council of the Roman Catholic Church, convoked to meet the crisis of the Protestant Reformation. Earlier efforts at reforming the ch...

Nauru

(Encyclopedia)Nauru näo͞oˈro͞o [key], officially Republic of Nauru, atoll and independent republic (2015 est. pop. 11,000), c.8 sq mi (20 sq km), central Pacific, just south of the equator and west of the Gilbe...