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Mason-Dixon Line

(Encyclopedia)Mason-Dixon Line, boundary between Pennsylvania and Maryland (running between lat. 39°43′26.3″N and lat. 39°43′17.6″N), surveyed by the English team of Charles Mason, a mathematician and ast...

Charles Emmanuel I

(Encyclopedia)Charles Emmanuel I, 1562–1630, duke of Savoy (1580–1630), son and successor of Emmanuel Philibert. He continued his father's efforts to recover territories lost to the duchy, but his reckless, alt...

oligarchy

(Encyclopedia)oligarchy ŏlˈəgärkē [key] [Gr.,=rule by the few], rule by a few members of a community or group. When referring to governments, the classical definition of oligarchy, as given for example by Aris...

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...

Smith, Dean Edwards

(Encyclopedia)Smith, Dean Edwards, 1931–2015, American college basketball coach, b. Emporia, Kans. After playing basketball at the Univ. of Kansas (grad. 1953), Smith joined (1954) the Air Force and became an ass...

Ferrara-Florence, Council of

(Encyclopedia)Ferrara-Florence, Council of, 1438–45, second part of the 17th ecumenical council of the Roman Catholic Church; the first part was the Council of Basel, canonically convened but after 1437 schismati...

Hercules, Greek hero

(Encyclopedia)Hercules both: hĕrˈəklēzˌ [key], most popular of all Greek heroes, famous for extraordinary strength and courage. Alcmene, wife of Amphitryon, made love to both Zeus and her husband on the same n...

pacemaker, artificial

(Encyclopedia)pacemaker, artificial, device used to stimulate a rhythmic heartbeat by means of electrical impulses. Implanted in the body when the heart's own electrical conduction system (natural pacemaker) does n...

elephant

(Encyclopedia)elephant, largest living land mammal, found in tropical regions of Africa and Asia. Elephants have massive bodies and heads, thick, pillarlike legs, and broad, short padded feet, with toes bearing hea...

Ebbers, Bernie

(Encyclopedia)Ebbers, Bernie (Bernard John Ebbers), 1941–, American business executive and white-collar criminal, b. Edmonton, Alta, grad. Mississippi College (1967). After running a small motel chain, he entered...