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luminescence
(Encyclopedia) luminescence, general term applied to all forms of cool light, i.e., light emitted by sources other than a hot, incandescent body, such as a blackbody radiator. Luminescence is caused…osmium
(Encyclopedia) osmiumosmiumŏzˈmēəm [key], metallic chemical element; symbol Os; at. no. 76; at. wt. 190.23; m.p. 3,045±30℃; b.p. 5,027±100℃; sp. gr. 22.57 at 20℃; valence usually +0 to +8. Osmium is…Marion
(Encyclopedia) Marion. 1 City (1990 pop. 14,545), seat of Williamson co., S Ill.; inc. 1841. It is the commercial and retail center of a farm and coal area and has a large soft drink bottling plant.…cupric sulfate
(Encyclopedia) cupric sulfatecupric sulfatek&oomacr;ˈprĭk sŭlˈfāt, ky&oomacr;ˈ– [key] or copper (II) sulfate, chemical compound, CuSO4, taking the form of white rhombohedral crystals or…harness
(Encyclopedia) harness, comprehensive term for the gear of a draft animal, excluding the yoke, by which it is attached to the load that it pulls. Although harnesses are used on dogs (for drawing…anise
(Encyclopedia) aniseaniseănˈĭs [key], annual plant (Pimpinella anisum) of the family Umbelliferae (parsley family), native to the Mediterranean region but long cultivated elsewhere for its aromatic…boiler
(Encyclopedia) boiler, device for generating steam. It consists of two principal parts: the furnace, which provides heat, usually by burning a fuel, and the boiler proper, a device in which the heat…vetch
(Encyclopedia) vetch, common name for many weak-stemmed, leguminous herbs of the genus Vicia of the family Leguminosae (pulse family). The vetches are chiefly annuals, distributed over temperate…xerography
(Encyclopedia) xerographyxerographyzərŏgˈrəfēˌ [key], also called electrophotography, method of dry photocopying in which the image is transferred by using the attractive forces of electric charges.…Langeland
(Encyclopedia) LangelandLangelandlängˈəlăn [key], narrow island (1992 pop. 15,226), 110 sq mi (285 sq km), S Denmark, between Fyn and Lolland. Rudkøbing is the main town; other towns include Bagenkop…Trending
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