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emetic

(Encyclopedia)emetic əmĕtˈĭk [key], substance that produces vomiting. Direct, or gastric, emetics, which act directly on the stomach, include syrup of ipecac, sulfate of zinc or copper, alum, ammonium carbonate...

Xiang

(Encyclopedia)Xiang shyäng, syäng [key], river, 715 mi (1,151 km) long, rising in NE Guangxi prov. and flowing N through Hunan prov. to Dongting Lake, SE China. The river is navigable to large vessels for most of...

germanium

(Encyclopedia)germanium jərmāˈnēəm [key] [from Germany], semimetallic chemical element; symbol Ge; at. no. 32; at. wt. 72.63; m.p. 937.4℃; b.p. 2,830℃; sp. gr. 5.323 at 25℃; valence +2 or +4. Pure german...

Freiberg

(Encyclopedia)Freiberg frīˈbĕrkh [key], city, Saxony, E Germany. It is an industrial center and a rail j...

Gifu

(Encyclopedia)Gifu gēˈfo͞o [key], city, capital of Gifu prefecture, central Honshu, Japan. A manufacturi...

synthetic elements

(Encyclopedia)synthetic elements, in chemistry, radioactive elements that were not discovered occurring in nature but as artificially produced isotopes. They are technetium (at. no. 43), which was the first element...

sulfur dioxide

(Encyclopedia)sulfur dioxide, chemical compound, SO2, a colorless gas with a pungent, suffocating odor. It is readily soluble in cold water, sparingly soluble in hot water, and soluble in alcohol, acetic acid, and ...

barbed wire

(Encyclopedia)barbed wire, wire composed of two zinc-coated steel strands twisted together and having barbs spaced regularly along them. The need for barbed wire arose in the 19th cent. as the American frontier mov...

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 Arkansas and Mis...

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