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Gila

(Encyclopedia)Gila hēˈlə [key], river, 630 mi (1,014 km) long, rising in the mountains of W N.Mex. and flowing W across Ariz. to the Colorado River at Yuma, Ariz.; the San Francisco River is its main tributary. ...

Unknown Soldier, Tomb of the

(Encyclopedia)Unknown Soldier, Tomb of the, form of memorial to a nation's war dead, adopted by many countries after World War I. The Tomb of the Unknowns, a memorial to the American dead of World Wars I and II, th...

fluoridation

(Encyclopedia)fluoridation flo͝orˌĭdāˈshən [key], process of adding a fluoride to the water supply of a community to preserve the teeth of the inhabitants. Tooth enamel ordinarily contains small amounts of fl...

Holmes, William Henry

(Encyclopedia)Holmes, William Henry, 1846–1933, American geologist, anthropologist, and museum director, b. Harrison co., Ohio. He was internationally recognized for his work in museum science. In 1872 he became ...

Buffalo Bill

(Encyclopedia)Buffalo Bill, 1846–1917, American plainsman, scout, and showman, b. near Davenport, Iowa. His real name was William Frederick Cody. His family moved (1854) to Kansas, and after the death of his fath...

White, Byron Raymond

(Encyclopedia)White, Byron Raymond, 1917–2002, associate justice of the U.S. Supreme Court (1962–93), b. Fort Collins, Colo. An All-America football player nicknamed “Whizzer” who later starred as a profess...

Jurassic period

(Encyclopedia)Jurassic period jərăsˈĭk [key] [from the Jura Mts.], second period of the Mesozoic era of geologic time, lasting from 213 to 144 million years ago. At the start of the Jurassic most of the contine...

mountain laurel

(Encyclopedia)mountain laurel, evergreen shrub (Kalmia latifolia) of the family Ericaceae (heath family), closely related to the rhododendron and native to E North America. The state flower of Connecticut and Penns...

Helwan

(Encyclopedia)Helwan wänˈ [key], town (1989 est. pop. 230,000), N Egypt, on the Nile River, opposite the ruins of Memphis; a suburb of Cairo. Manufactures include iron and steel, cement, and textiles; there is a ...

Young, Al

(Encyclopedia)Young, Al (Albert James), 1939-2021, Univ. of Calif., Berkeley (BA, 1969), African-American poet, b. Ocean Springs, Ms. The son of sharecroppers, Young'...