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Hereford cattle

(Encyclopedia) Hereford cattleHereford cattlehûrˈfərd [key], breed of beef cattle originated in Herefordshire, England, and thought to be descended from the primitive cattle of the country. They are…

neutron star

(Encyclopedia) neutron star, extremely small, extremely dense star, with as much as double the sun's mass but only a few miles in radius, in the final stage of stellar evolution. Astronomers Baade…

Amadeus, Lake

(Encyclopedia) Amadeus, LakeAmadeus, Lakeəmăˈdēəs [key], large, usually dry, shallow salt lake, 340 sq mi (881 sq km), 76 mi (122 km) long, 12 mi (19 km) wide, SW Northern Territory, Australia. The…

Hadrian's Wall

(Encyclopedia) Hadrian's Wall, ancient Roman wall, 73.5 mi (118.3 km) long, across the narrow part of the island of Great Britain from Wallsend on the Tyne River to Bowness at the head of Solway…

polyester

(Encyclopedia) polyester, synthetic fiber, produced by the polymerization of the product formed when an alcohol and organic acid react. The outstanding characteristic of polyesters is their ability…

scar

(Encyclopedia) scar, fibrous connective tissue that forms at the site of injury or disease in any tissue of the body. Scar tissue may replace injured skin and underlying muscle, damaged heart muscle…

oilcloth

(Encyclopedia) oilcloth, originally, cloth treated with oil or other substances so as to be waterproof and used for fishermen's and sailors' wear, for coach robes and covers, and later as a floor…

Sigillaria

(Encyclopedia) SigillariaSigillariasĭjĭlârˈēə [key], genus of fossil club moss allied to Lepidodendron, abundant in the Carboniferous period. The thick trunk was rarely branched and was covered for…

napalm

(Encyclopedia) napalmnapalmnāˈpäm [key], incendiary material developed during World War II by Harvard scientists cooperating with the U.S. army and used in bombs and flame throwers. Napalm is based…

mucilage

(Encyclopedia) mucilagemucilagemy&oomacr;ˈsəlĭj [key], thick, glutinous substance, related to the natural gums, comprised usually of protein, polysaccharides, and uranides. It swells but does not…