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orientation
(Encyclopedia) orientation, in architecture, the disposition of the parts of a building with reference to the points of the compass. From remote antiquity the traditional belief in the efficacy of…Eden, Anthony, 1st earl of Avon
(Encyclopedia) Eden, Anthony, 1st earl of Avon Eden, Anthony, 1st earl of Avon āˈvən [key], 1897–1977, British…Geiger counter
(Encyclopedia) Geiger counter or Geiger-Müller (G-M) counterGeiger countergīˈgər-mŭlˈər, –my&oomacr;ˈlər [key], instrument for the detection and quantitative determination of ionizing radiation…helicopter
(Encyclopedia) helicopter, type of aircraft in which lift is obtained by means of one or more power-driven horizontal propellers called rotors. When the rotor of a helicopter turns it produces…gyroscope
(Encyclopedia) CE5 Three-frame gyroscope gyroscopegyroscopejīˈrəskōpˌ [key], symmetrical mass, usually a wheel, mounted so that it can spin about an axis in any direction. When spinning, the…momentum
(Encyclopedia) momentummomentummōmĕnˈtəm [key], in mechanics, the quantity of motion of a body, specifically the product of the mass of the body and its velocity. Momentum is a vector quantity; i.e…circle
(Encyclopedia) CE5 Circle circle, closed plane curve consisting of all points at a given distance from some fixed point, called the center. A circle is a conic section cut by a plane…Teilhard de Chardin, Pierre
(Encyclopedia) Teilhard de Chardin, PierreTeilhard de Chardin, Pierrepyĕr tāyärˈ də shärdăNˈ [key], 1881–1955, French paleontologist and philosopher. He entered (1899) the Jesuit order, was ordained…planetarium
(Encyclopedia) planetarium, optical device used to project a representation of the heavens onto a domed ceiling; the term also designates the building that houses such a device. A modern planetarium…World War II
(Encyclopedia) World War II, 1939–45, worldwide conflict involving every major power in the world. The two sides were generally known as the Allies and the Axis. Although hostilities came to…Trending
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