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linoleum
(Encyclopedia) linoleumlinoleumlĭnōˈlēəm [key], resilient floor or wall covering made of burlap, canvas, or felt, surfaced with a composition of wood flour, oxidized linseed oil, gums or other…cyanide process
(Encyclopedia) cyanide process or cyanidation, method for extracting gold from its ore. The ore is first finely ground and may be concentrated by flotation; if it contains certain impurities, it may…camphor
(Encyclopedia) camphorcamphorkămˈfər [key], C10H16O, white, crystalline solid ketone with a characteristic pungent odor and taste. It melts at 176℃ and boils at 204℃. The natural variety, Japan…balance
(Encyclopedia) balance, instrument used in laboratories and pharmacies to measure the mass or weight of a body. A balance functions by measuring the force of gravity that the earth exerts on an…caustic
(Encyclopedia) caustic, any strongly corrosive chemical substance, especially one that attacks organic matter. A caustic alkali is a metal hydroxide, especially that of an alkali metal; caustic soda…helium
(Encyclopedia) heliumheliumhēˈlēəm [key], gaseous chemical element; symbol He; at. no. 2; at. wt. 4.0026; m.p. below −272℃ at 26 atmospheres pressure; b.p. −268.934℃ at 1 atmosphere pressure; density…jai alai
(Encyclopedia) jai alaijai alaihīˈlīˌ [key], handball-like game of Spanish Basque origin. It is also called pelota. Jai alai is played on a three-walled court with a hard rubber ball that must be…twilight
(Encyclopedia) twilight, period between sunset and total darkness or between total darkness and sunrise. Total darkness does not occur immediately when the sun sinks below the horizon because light…phosphorus
(Encyclopedia) phosphorusphosphorusfŏsˈfərəs [key] [Gr.,=light-bearing], nonmetallic chemical element; symbol P; at. no. 15; at. wt. 30.97376; m.p. 44.1℃; b.p. about 280℃; sp. gr. 1.82 at 20℃;…acetylene
(Encyclopedia) acetyleneacetyleneəsĕtˈəlēnˌ [key] or ethyneethyneĕthˈīn [key], HC≡CH, a colorless gas. It melts at −80.8℃ and boils at −84.0℃. Offensive odors often noted in commercial acetylene are…Trending
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