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Clinch

(Encyclopedia)Clinch, river, c.300 mi (480 km) long, formed by the junction of two forks in SW Va., and flowing generally SW across E Tenn. to the Tennessee River at Kingston. Its waters and those of its tributary,...

ataxia

(Encyclopedia)ataxia ətăkˈsēə [key], lack of coordination of the voluntary muscles resulting in irregular movements of the body. Ataxia can be brought on by an injury, infection, or degenerative disease of the...

Atbarah

(Encyclopedia)Atbarah or Atbara both: ătbäˈrə [key], town, E Sudan, at the junction of the Atbara and Nile rivers. An important rail junction, it is also the headquarters of Sudan's...

Norris, John

(Encyclopedia)Norris, John, 1657–1711, English clergyman and philosopher. As the most prominent follower of Malebranche he wrote, in exposition of that philosopher's system, An Essay towards the Theory of the Ide...

Notre Dame, University of

(Encyclopedia)Notre Dame, University of nōˈtər dām, nōˈtrə [key], at Notre Dame, Ind., near South Bend; Roman Catholic; coeducational; est. and opened 1842, chartered 1844. It has a noted law school and comp...

Olney, Jesse

(Encyclopedia)Olney, Jesse ŏlˈnē, ōlˈnē [key], 1798–1872, American geographer and teacher. His Practical System of Modern Geography (1828), a standard work for decades, revolutionized the teaching of geogra...

Pocono Mountains

(Encyclopedia)Pocono Mountains pōˈkənō [key], range of the Appalachian system, c.2,000 ft (610 m) high, NE Pa. Forested and having many lakes and streams, the Poconos are a major resort area. There are year-rou...

pyrolusite

(Encyclopedia)pyrolusite pīˈrōlo͞ozīt [key], naturally occurring manganese dioxide, MnO2, a black mineral that crystallizes in the tetragonal system but is usually found in earthy or massive deposits. It is th...

pyrrhotite

(Encyclopedia)pyrrhotite pĭrˈətīt [key] or magnetic pyrites, bronze-yellow to bronze-red mineral, a sulfide of iron sometimes containing nickel. It tarnishes easily and is somewhat magnetic. It crystallizes in ...

physician assistant

(Encyclopedia)physician assistant (PA), health-care professional who provides patient services ranging from taking medical histories and doing physical examinations to performing minor surgical procedures; often ca...