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Pennsylvania, University of
(Encyclopedia) Pennsylvania, University of, in Philadelphia; private with some state support; coeducational. It dates to 1740 and plans for a charity school, and the first predecessor opened in 1751…beryllium
(Encyclopedia) berylliumberylliumbərĭlˈēəm [key] [from beryl ], metallic chemical element; symbol Be; at. no. 4; at. wt. 9.01218; m.p. about 1,278℃; b.p. 2,970℃ (estimated); sp. gr. 1.85 at 20℃;…hydrogen fluoride
(Encyclopedia) hydrogen fluoride, chemical compound, HF, a colorless, fuming liquid or colorless gas that boils at 19.54℃. It is miscible with water and is soluble in benzene, toluene, and…nautilus, in zoology
(Encyclopedia) nautilus or chambered nautilus, cephalopod mollusk belonging to the sole surviving genus (Nautilus) of a subclass that flourished 200 million years ago, known as the nautiloids. The…Zadar
(Encyclopedia) ZadarZadarzäˈdär [key], Ital. Zara, city (2011 pop. 75,062), W Croatia, on the Dalmatian coast of the Adriatic Sea. A seaport and a tourist center, it has industries that produce…trombone
(Encyclopedia) trombone [Ital.,=large trumpet], brass wind musical instrument of cylindrical bore, twice bent on itself, having a sliding section that lengthens or shortens it and thus regulates the…hornpipe
(Encyclopedia) hornpipe, English folk dance known since the 16th cent., when it obtained its name from the wind instrument that accompanied it. The hornpipes of the 17th and 18th cent. have moderate…will-o'-the-wisp
(Encyclopedia) will-o'-the-wisp, phenomenon known also as ignis fatuus and jack-o'-lantern. It is seen at night as a pale, flickering light over marshland. There is no generally accepted explanation…sulfuric acid
(Encyclopedia) sulfuric acid, chemical compound, H2SO4, colorless, odorless, extremely corrosive, oily liquid. It is sometimes called oil of vitriol. Although sulfuric acid is now one of the…Racibórz
(Encyclopedia) RacibórzRacibórzrätsēˈb&oomacr;sh [key], Ger. Ratibor, town (1994 est. pop. 65,300), Śląskie prov., S Poland, on the Oder River. A river port and rail junction, it also has…Trending
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