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pupa
(Encyclopedia) pupapupapy&oomacr;ˈpə [key], name for the third stage in the life of an insect that undergoes complete metamorphosis, i.e., develops from the egg through the larva and the pupa…black hole
(Encyclopedia) black hole, in astronomy, celestial object of such extremely intense gravity that it attracts everything near it and in some instances prevents everything, including light, from…star
(Encyclopedia) star, hot incandescent sphere of gas, held together by its own gravitation, and emitting light and other forms of electromagnetic radiation whose ultimate source is nuclear energy…lens, in optics
(Encyclopedia) CE5 Lenses lens, device for forming an image of an object by the refraction of light. In its simplest form it is a disk of transparent substance, commonly glass, with its two…tariff
(Encyclopedia) tariff, tax on imported and, more rarely, exported goods. It is also called a customs duty. Tariffs may be distinguished from other taxes in that their predominant purpose is not…compact disc
(Encyclopedia) compact disc (CD), a small plastic disc used for the storage of digital data. As originally developed for audio systems, the sound signal is sampled at a rate of 44,100 times a second…amphibian, in zoology
(Encyclopedia) amphibian, in zoology, cold-blooded vertebrate animal of the class Amphibia. There are three living orders of amphibians: the frogs and toads (order Anura, or Salientia), the…gang
(Encyclopedia) gang, group of people organized for a common purpose, often criminal. Gangs of criminals were long known on the American frontier and also flourished in urban settings. Notorious were…grasshopper
(Encyclopedia) grasshopper, name applied to almost 9,000 different species of singing, jumping insects in two families of the order Orthoptera. Grasshoppers are long, slender, winged insects with…Mahler, Gustav
(Encyclopedia) Mahler, GustavMahler, Gustavg&oobreve;sˈtäf mäˈlər [key], 1860–1911, composer and conductor, born in Austrian Bohemia of Jewish parentage. Mahler studied at the Univ. of Vienna and…Trending
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