cogwheel ore
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cogwheel ore — noun : bournonite * * * Mineral. bournonite … Useful english dictionary
bournonite — /bawr neuh nuyt , bohr , boor /, n. Mineral. a sulfide of lead, antimony, and copper, PbCuSbS3, occurring in gray to black crystals or granular masses. Also called cogwheel ore. [1795 1805; named after Count J. L. de Bournon (d. 1825), French… … Universalium
Angola — Angolan, adj., n. /ang goh leuh/, n. a republic in SW Africa: formerly an overseas province of Portugal; gained independence Nov. 11, 1975. 10,623,994; 481,226 sq. mi. (1,246,375 sq. km). Cap.: Luanda. Formerly, Portuguese West Africa. * * *… … Universalium
Angola — <p></p> <p></p> Introduction ::Angola <p></p> Background: <p></p> Angola is still rebuilding its country since the end of a 27 year civil war in 2002. Fighting between the Popular Movement for the… … The World Factbook
Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… … Wikipedia
