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González Martínez, Enrique

(Encyclopedia)González Martínez, Enrique ānrēˈkā gōnsäˈlĕs märtēˈnĕs [key], 1871–1952, Mexican poet, physician, and diplomat. His early poetry, written during the 17 years of his medical practice, s...

Gatún Lake

(Encyclopedia)Gatún Lake gäto͞onˈ [key], artificial lake, 163 sq mi (422 sq km), Colón Prov., Panama, formed by the impounding of the Chagres River. Gatún Dam (completed 1912), 11⁄2 mi (2.4 km) long and 115...

strychnine

(Encyclopedia)strychnine strĭkˈnĭn [key], bitter alkaloid drug derived from the seeds of a tree, Strychnos nux-vomica, native to Sri Lanka, Australia, and India. It has been used as a rat poison for five centuri...

Orbiting Astronomical Observatory

(Encyclopedia)Orbiting Astronomical Observatory (OAO), series of four orbiting observatories (see observatory, orbiting) launched between 1966 and 1972 by the National Aeronautics and Space Administration (NASA) to...

radio

(Encyclopedia)CE5 A. AM transmitter B. AM receiver radio, transmission or reception of electromagnetic radiation in the radio frequency range. The term is commonly applied also to the equipment used, especially...

Negro, Río, river, Uruguay and Brazil

(Encyclopedia)Negro, Río rēˈō nāˈgrō [key], principal river of Uruguay, c.500 mi (800 km) long, rising in S Brazil and flowing SW across central Uruguay to the Uruguay River. It traverses a sheep-raising reg...

Krefeld

(Encyclopedia)Krefeld krāˈfĕlt [key], city (1994 pop. 249,560), North Rhine–Westphalia, W Germany, a port on the Rhine River. It is the center of the German silk and velvet industry, and is a major rail hub an...

chrysoberyl

(Encyclopedia)chrysoberyl krĭsˈəbĕrˌĭl [key] [Gr.,=golden beryl], a beryllium aluminate used as a gem. It has a vitreous luster and is transparent to translucent. The more valuable cat's-eye is a variety of c...

Esperanto

(Encyclopedia)Esperanto ĕspəränˈtō [key], an artificial language introduced in 1887 and intended by its inventor, Dr. Ludwik Lejzer Zamenhof (1859–1917), a Polish oculist and linguist, to ease communication ...

castor oil

(Encyclopedia)castor oil, yellowish oil obtained from the seed of the castor bean. The oil content of the seeds varies from about 20% to 50%. After the hulls are removed the seeds are cold-pressed. Medicinal castor...