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boric acid
(Encyclopedia)boric acid, any one of the three chemical compounds, orthoboric (or boracic) acid, metaboric acid, and tetraboric (or pyroboric) acid; the term often refers simply to orthoboric acid. The acids may be...tar and pitch
(Encyclopedia)tar and pitch, viscous, dark-brown to black substances obtained by the destructive distillation of coal, wood, petroleum, peat, and certain other organic materials. The heating or partial burning of w...Cartagena, city, Colombia
(Encyclopedia)Cartagena kärtähāˈnä [key], city, capital of Bolívar dept., NW Colombia, a port on the ...Vichy
(Encyclopedia)Vichy vĭshˈē, Fr. vēshēˈ [key], city (1990 pop. 28,048), Allier dept., central France, on the Allier River. Vichy's hot mineral springs made it one of the foremost spas in Europe, with a casino ...almond
(Encyclopedia)almond, name for a small tree (Prunus amygdalus) of the family Rosaceae (rose family) and for the nutlike, edible seed of its drupe fruit. The “nuts” of sweet-almond varieties are eaten raw or roa...alumina
(Encyclopedia)alumina əlo͞oˈmĭnə [key] or aluminum oxide, Al2O3, chemical compound with m.p. about 2,000℃ and sp. gr. about 4.0. It is insoluble in water and organic liquids and very slightly soluble in stro...glycol
(Encyclopedia)glycol glīˈkōl [key], dihydric alcohol in which the two hydroxyl groups are bonded to different carbon atoms; the general formula for a glycol is (CH2)n(OH)2. The most important glycol is the simpl...olive oil
(Encyclopedia)olive oil, pale yellow to greenish oil obtained from the pulp of olives by separating the liquids from solids. Olive oil was used in the ancient world for lighting, in the preparation of food, and as ...Madonna
(Encyclopedia)Madonna (Madonna Louise Ciccone) mədŏnˈə, chĭkōˈnē [key], 1958–, American p...acne
(Encyclopedia)acne, common inflammatory disease of the hair follicles and sebaceous glands characterized by blackheads, whiteheads, pustules, nodules and, in the more severe forms, by cysts and scarring. The lesion...Browse by Subject
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