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distillation
(Encyclopedia)distillation, process used to separate the substances composing a mixture. It involves a change of state, as of liquid to gas, and subsequent condensation. The process was probably first used in the p...Neptune, in astronomy
(Encyclopedia)Neptune, in astronomy, 8th planet from the sun at a mean distance of about 2.8 billion mi (4.5 billion km) with an orbit lying between those of Uranus and the dwarf planet Pluto; its period of revolut...ultraviolet astronomy
(Encyclopedia)ultraviolet astronomy, study of celestial objects by means of the ultraviolet radiation they emit, in the wavelength range from about 90 to about 350 nanometers. Ultraviolet (UV) line spectrum measure...string theory
(Encyclopedia)string theory, description of elementary particles based on one-dimensional curves, or “strings,” instead of point particles. Superstring theory, which is string theory that contains a kind of sym...spectroscope
(Encyclopedia)spectroscope, optical instrument for producing spectral lines and measuring their wavelengths and intensities, used in spectral analysis (see spectrum). When a material is heated to incandescence it e...Premadasa, Ranasinghe
(Encyclopedia)Premadasa, Ranasinghe, 1924–1993, Sri Lankan political leader. As a member of the Ceylon Labour party, he worked as a labor organizer and was elected deputy mayor of Colombo in 1955. He then joined ...grosbeak
(Encyclopedia)grosbeak grōsˈbēk [key] [great beak], common name for various members of the family Fringillidae (finch family). Grosbeaks are characterized by their large conical bills. The male rose-breasted gro...hoe
(Encyclopedia)hoe, usually a flat blade, variously shaped, set in a long wooden handle and used primarily for weeding and for loosening the soil. It was the first distinctly agricultural implement. The earliest hoe...horse latitudes
(Encyclopedia)horse latitudes, two belts of latitude where winds are light and the weather is hot and dry. They are located mostly over the oceans, at about 30° lat. in each hemisphere, and have a north-south rang...Oldenburg, Claes
(Encyclopedia)Oldenburg, Claes klăs [key], 1929–, Swedish-American artist, b. Stockholm, raised Chicago, studied at Yale, moved to New York 1956. Usually considered part of the pop art movement, Oldenburg explor...Browse by Subject
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