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library
(Encyclopedia)library, a collection of books or other written or printed materials, as well as the facility in which they are housed and the institution that is responsible for their maintenance. Modern libraries m...Gutenberg, Johann
(Encyclopedia)Gutenberg, Johann go͞oˈtənbərg, Ger. yōˈhän go͞oˈtənbĕrk [key], c.1397–1468, German inventor and printer, long credited with the invention of a method of printing from movable type, inclu...dark matter
(Encyclopedia)dark matter, material that is believed to make up nearly 27% of the mass of the universe but is not readily visible because it neither emits nor reflects electromagnetic radiation, such as light or ra...engineering
(Encyclopedia)engineering, profession devoted to designing, constructing, and operating the structures, machines, and other devices of industry and everyday life. Until the Industrial Revolution there were only t...European Southern Observatory
(Encyclopedia)European Southern Observatory (ESO), an intergovernmental organization for astronomical research with headquarters in Garching, near Munich, Germany. The ESO began in 1962 as a consortium among Belgiu...factory
(Encyclopedia)factory, place of production characterized by wage labor, the use of machinery, and the division of labor. The large-scale use of machinery differentiates factory production from simple manufacture, a...piano
(Encyclopedia)piano or pianoforte, musical instrument whose sound is produced by vibrating strings struck by felt hammers that are controlled from a keyboard. The piano's earliest predecessor was the dulcimer. The ...San Diego
(Encyclopedia)San Diego săn dēāˈgō [key], city (1990 pop. 1,110,549), seat of San Diego co., S Calif., on San Diego Bay; inc. 1850. San Diego includes the unincorporated communities of La Jolla and Spring Vall...galaxy
(Encyclopedia) CE5 Hubble classification of galaxies: Elliptical galaxies (E) are classified according to the degree of flattening of the ellipse. Spiral galaxies (S) and barred spiral galaxies (SB) are classifie...dictionary
(Encyclopedia)dictionary, published list, in alphabetical order, of the words of a language. In monolingual dictionaries the words are explained and defined in the same language; in bilingual dictionaries they are ...Browse by Subject
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