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tartar, dental
(Encyclopedia) tartar, dental, precipitate of saliva that accumulates around teeth at the gum line. Composed primarily of calcium salts, tartar forms as a hard brownish substance that irritates gums…Walnut Creek
(Encyclopedia) Walnut Creek, residential city (1990 pop. 60,569), Contra Costa co., W Calif., in the San Francisco Bay area; inc. 1914. It is the trade and shipping center of an extensive…Bridgeton
(Encyclopedia) Bridgeton. 1 City (2020 pop. 11,458), St. Louis co., E Mo., on the Missouri River; settled c.1765, inc. 1843. Consumer goods and metal…aquaculture
(Encyclopedia) aquaculture, the raising and harvesting of fresh- and saltwater plants and animals. The most economically important form of aquaculture is fish farming, an industry that accounts for…Medici, Ferdinand I de'
(Encyclopedia) Medici, Ferdinand I de', 1549–1609, grand duke of Tuscany (1587–1609); brother and successor of Francesco de' Medici. He was made a cardinal in his youth, and he built the famous Villa…ash, in chemistry
(Encyclopedia) ash, in chemistry, solid residue of combustion. The chemical composition of an ash depends on that of the substance burned. Wood ash contains metal carbonates (e.g., potassium…Augsburg, Peace of
(Encyclopedia) Augsburg, Peace of, 1555, temporary settlement within the Holy Roman Empire of the religious conflict arising from the Reformation. Each prince was to determine whether Lutheranism or…Illinois, University of
(Encyclopedia) Illinois, University of, main campus at Urbana-Champaign; land-grant with state and federal support; coeducational; chartered 1867, opened 1868 as Illinois Industrial Univ., renamed…Louis III, French king
(Encyclopedia) Louis III, c.863–882, French king, son of King Louis II. He became joint ruler with his brother Carloman on the death of Louis II (879), despite the attempts of Louis the Younger to…Lovejoy, Owen
(Encyclopedia) Lovejoy, Owen, 1811–64, American abolitionist, b. Albion, Maine, educated at Bowdoin College. He witnessed the killing of his brother Elijah P. Lovejoy, under whom he had studied for…Trending
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