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nicotine

(Encyclopedia)nicotine, C10H14N2, poisonous, pale yellow, oily liquid alkaloid with a pungent odor and an acrid taste. It turns brown on exposure to air. Nicotine, a naturally occurring constituent of tobacco, is t...

dialysis

(Encyclopedia)dialysis dīălˈĭsĭs [key], in chemistry, transfer of solute (dissolved solids) across a semipermeable membrane. Strictly speaking, dialysis refers only to the transfer of the solute; transfer of t...

Painted Desert

(Encyclopedia)Painted Desert, badlands on the northeastern bank of the Little Colorado River, NE Ariz., stretching c.200 mi (320 km) SE from the Grand Canyon; includes Petrified Forest National Park. Striking bands...

Pará, river, Brazil

(Encyclopedia)Pará, river, c.200 mi (320 km) long, N Brazil. It is actually the southeastern arm or estuary of the Amazon, divided from the rest of the river by Marajó island. It receives the waters of the Tocant...

Beth-hogla

(Encyclopedia)Beth-hogla or Beth-hoglah both: bĕth-hŏgˈlə [key], in the Bible, a town, the modern Ayn Hajalah in the West Bank, W of the Jordan, SE of Jericho. ...

Mutharika, Bingu wa

(Encyclopedia)Mutharika, Bingu wa bēngˈgo͞o wä mo͞otäˈrēkä [key], 1934–2012, Malawian economist and political leader, b. Nyasaland (now Malawi) as Brightson Webster Ryson Thom; he africanized his name du...

District of Columbia

(Encyclopedia)District of Columbia, federal district (2020 pop. 689,545), 69 sq mi (179 sq km), on the east bank of the Potomac River, coextensive with the city of Wa...

Baker, George Fisher

(Encyclopedia)Baker, George Fisher, 1840–1931, American financier and philanthropist, b. Troy, N.Y. Baker was one of the founders of the First National Bank of New York in 1863 and became (1877) its president and...

Baring

(Encyclopedia)Baring bârˈĭng [key], British family of bankers. Sir Francis Baring (1740–1810) founded (1763) the John and Francis Baring Company, which he renamed Baring Brothers and Company in 1806. At first ...

macular degeneration

(Encyclopedia)macular degeneration, eye disorder causing loss of central vision. The affected area, the macula, lies at the back of the retina and is the part that produces the sharpest vision. The most serious vis...