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chemical reaction
(Encyclopedia) chemical reaction, process by which one or more substances may be transformed into one or more new substances. Energy is released or is absorbed, but no loss in total molecular weight…darmstadtium
(Encyclopedia) darmstadtium, artificially produced radioactive chemical element; symbol Ds; at. no. 110; mass number of most stable isotope 281; m.p., b.p., sp. gr., and valence unknown. Situated in…copernicium
(Encyclopedia) copernicium, artificially produced radioactive chemical element; symbol Cn; at. no. 112; mass number of most stable isotope 285; m.p., b.p., sp. gr., and valence unknown. Situated in…aleatory music
(Encyclopedia) aleatory musicaleatory musicāˈlēətôrˌē [key] [Lat. alea=dice game], music in which elements traditionally determined by the composer are determined either by a process of random…David, Félicien César
(Encyclopedia) David, Félicien CésarDavid, Félicien CésarfālēsyăNˈ sāzärˈ dävēdˈ [key], 1810–76, French composer. His ode-symphony Le Desert (1844) and his opera Lalla-Roukh (1862) contain Eastern…Delvaux, Laurent
(Encyclopedia) Delvaux, LaurentDelvaux, LaurentlōräNˈ dĕlvōˈ [key], 1695–1778, Flemish sculptor. After studying in Rome, Delvaux developed a style that combined French neoclassic and Italian baroque…compound
(Encyclopedia) compound, in chemistry, a substance composed of atoms of two or more elements in chemical combination, occurring in a fixed, definite proportion and arranged in a fixed, definite…algebra
(Encyclopedia) algebra, branch of mathematics concerned with operations on sets of numbers or other elements that are often represented by symbols. Algebra is a generalization of arithmetic and gains…Cushing, Luther Stearns
(Encyclopedia) Cushing, Luther Stearns, 1803–56, American lawyer, b. Lunenburg, Mass., grad. Harvard Law School, 1826. His best-known work is his short Manual of Parliamentary Practice (1844; many…Donatus
(Encyclopedia) Donatus (Aelius Donatus)Donatusēˈlēəs dōnätˈəs [key], fl. 4th cent. a.d., Roman grammarian; teacher of St. Jerome. His only well-known work, the Ars grammatica [elements of grammar],…Trending
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