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aureole, in physics
(Encyclopedia) aureoleaureoleôrˈēōlˌ [key], in physics, luminous circle seen when the sun or other bright light is observed through a diffuse medium, i.e., smoke, thin cloud, fog, haze, or mist. It…pyroxene
(Encyclopedia) pyroxenepyroxenepīˈrŏksēn [key], name given to members of a group of widely distributed rock minerals called metasilicates in which magnesium, iron, and calcium, often with aluminum,…olivine
(Encyclopedia) olivineolivineŏlĭvˈēn [key], an iron-magnesium silicate mineral, (Mg,Fe)2SiO4, crystallizing in the orthorhombic system. It is a common constituent of magnesium-rich, silica-poor…amphibole
(Encyclopedia) amphiboleamphiboleămˈfəbōlˌ [key], any of a group of widely distributed rock-forming minerals, magnesium-iron silicates, often with traces of calcium, aluminum, sodium, titanium, and…garnet
(Encyclopedia) garnet, name applied to a group of isomorphic minerals crystallizing in the cubic system. They are used chiefly as gems and as abrasives (as in garnet paper). The garnets are double…Buch, Christian Leopold, Freiherr von
(Encyclopedia) Buch, Christian Leopold, Freiherr vonBuch, Christian Leopold, Freiherr vonkrĭsˈtyän lāˈōpôlt frīˈhĕr fən b&oomacr;kh [key], 1774–1853, German geologist and paleontologist, graduate…gneiss
(Encyclopedia) gneissgneissnīs [key], coarse-grained, imperfectly foliated, or layered, metamorphic rock. Gneiss is characterized by alternating light and dark bands differing in mineral composition…Ozarks, the
(Encyclopedia) Ozarks, the, or Ozark Plateau, upland region, actually a dissected plateau, c.50,000 sq mi (129,500 sq km), chiefly in S Mo. and N Ark., but partly in Oklahoma and Kansas, between the…Brewer's: Ignatius Loyola
found er of the order of Jesuits, is depicted in art sometimes with the sacred monogram I.H.S. on his breast, and sometimes contemplating it, surrounded by glory in the skies, in allusion…Brewer's: Ignis Fatuus
means strictly a fatuous fire it is also called “Jack o' Lantern,” “Spunkie,” “Walking Fire,” “Will o' the Wisp,” and “Fair Maid of Ireland”. Milton calls it Friar's Lanthern, and Sir…Trending
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