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wave, in physics

(Encyclopedia) wave, in physics, the transfer of energy by the regular vibration, or oscillatory motion, either of some material medium or by the variation in magnitude of the field vectors of an…

flood, in hydrology

(Encyclopedia) flood, inundation of land by the rise and overflow of a body of water. Floods occur most commonly when water from heavy rainfall, from melting ice and snow, or from a combination of…

wave, in the earth sciences

(Encyclopedia) CE5 A. Diagram of wave: Wave travels one wavelength during one period B. Diagram of wave: Phase relationships wave, in oceanography, an oscillating movement up and down, of a body…

Wordsworth, William

(Encyclopedia) Wordsworth, William, 1770–1850, English poet, b. Cockermouth, Cumberland. One of the great English poets, he was a leader of the romantic movement in England. Wordsworth's…

Persian literature

(Encyclopedia) Persian literature, literary writings in the Persian language, nearly all of it written in the area traditionally known as Persia, now Iran. The 15th cent. period of the second…

salmon, in zoology

(Encyclopedia) salmonsalmonsămˈən [key], member of the Salmonidae, a family of marine fish that spawn in freshwater, including the salmons, the trouts, and the chars (subfamily Salmoninae), the…

Orléans, French royal family

(Encyclopedia) OrléansOrléansôrlāäNˈ [key], family name of two branches of the French royal line. The house of Valois-Orléans was founded by Louis, duc d'Orléans (see separate article), whose…

Amazon, river, Peru and Brazil

(Encyclopedia) Amazon, Port. AmazonasAmazon,ämäzōˈnəs [key], world's second longest river, c.3,900 mi (6,280 km) long, formed by the junction in N Peru's Andes Mts. of two major headstreams, the…

Nauru Department of State Background

U.S. Department of State Background Note Nauru Index: Foreign Relations FOREIGN RELATIONSFollowing independence in 1968, Nauru joined the Commonwealth as a Special Member. Special Members take…