petroleum nitrogen bases
91Estonia — /e stoh nee euh, e stohn yeuh/, n. a republic in N Europe, on the Baltic, S of the Gulf of Finland: an independent republic 1918 40; annexed by the Soviet Union 1940; regained independence 1991. 1,444,721; 17,413 sq. mi. (45,100 sq. km). Cap.:… …
92Rwanda — Rwandan, adj., n. /rooh ahn deuh/, n. a republic in central Africa, E of the Democratic Republic of the Congo: formerly comprising the N part of the Belgian trust territory of Ruanda Urundi; became independent 1962. 7,737,537; 10,169 sq. mi.… …
93Amazon River — Portuguese Rio Amazonas River, northern South America. It is the largest river in the world in volume and area of drainage basin, and only the Nile River of northeastern Africa exceeds it in length. It originates within 100 mi (160 km) of the… …
94electrochemical reaction — ▪ chemistry Introduction any process either caused or accompanied by the passage of an electric current and involving in most cases the transfer of electrons between two substances one a solid and the other a liquid. Under ordinary… …
