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Agua Azul

(Encyclopedia)Agua Azul, series of waterfalls and pools on the Xanil River in Chiapas state, S Mexico, SW of Palenque in the Cascadas de Agua Azul Natural Park. The waters of the Agua Azul are noted for their brill...

quantum chromodynamics

(Encyclopedia)quantum chromodynamics (QCD), quantum field theory that describes the properties of the strong interactions between quarks and between protons and neutrons in the framework of quantum theory. Quarks p...

Leiter, Saul

(Encyclopedia)Leiter, Saul lītˈər [key], 1923–2013, American photographer, b. Pittsburgh. A painter in the early 1940s, Leiter switched to photography late in the decade. Along with Robert Frank and Diane Arbu...

Aliquippa

(Encyclopedia)Aliquippa ălĭkwĭpˈə [key], borough (2020 pop. 9,238), Beaver co., W Pa., in an industrialized region along the Ohio River N of Pittsburgh; inc. 1894. Aliquippa grew a...

Crawley

(Encyclopedia)Crawley, city and district, West Sussex, SE England. Crawley was designated one of the new towns in 1946 to alleviate overpopulation in London. There ar...

Bainbridge

(Encyclopedia)Bainbridge, city (2020 pop. 14,468), seat of Decatur co., SW Ga., on the Flint River; inc. 1829. It grew up around a fort, used by Andrew Jackson, that ...

buoy

(Encyclopedia)buoy boi, bo͞oˈē [key], float anchored in navigable waters to mark channels and indicate dangers to navigation (isolated rocks, mine fields, cables, and the like). The shape, color, number, and mar...

Keene

(Encyclopedia)Keene, city (1990 pop. 22,430), seat of Cheshire co., SW N.H., on the Ashuelot River; settled 1736, inc. as a city 1873. It is a trade and manufacturing center in a farming and resort area. There is p...

Aiken

(Encyclopedia)Aiken, city (2020 pop. 32,025), seat of Aiken co., W S.C.; inc. 1835. A resort and polo center and a training area for Thoroughbreds, Aiken has apparel, printing and publishing, drug, and ...

Sweynheym, Conrad

(Encyclopedia)Sweynheym, Conrad kônˈrät svīnˈhīm [key], fl. 15th cent., early printer. Originally from near Mainz, Germany, Sweynheym with Arnold Pannartz established (c.1464) in the monastery of Subiaco the ...