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Lenz's law

(Encyclopedia)Lenz's law, physical law, discovered by the German scientist H. F. E. Lenz in 1834, that states that the electromotive force (emf) induced in a conductor moving perpendicular to a magnetic field tends...

Ludlow, Roger

(Encyclopedia)Ludlow, Roger, b. 1590, d. after 1664, one of the founders of Connecticut, b. England. Educated at Oxford and admitted to the Inner Temple to study law, he was elected (1630) an assistant of the Massa...

de Vries, Hugo

(Encyclopedia)de Vries, Hugo hüˈgō də vrēs [key], 1848–1935, Dutch botanist. He opened a new approach to the study of evolution by using the experimental method to investigate the processes of evolution. His...

Diniz

(Encyclopedia)Diniz, Port. Dinis dēnēshˈ [key], 1261–1325, king of Portugal (1279–1325), son and successor of Alfonso III. Like his grandfather, Alfonso X of Castile, whose legal works he had translated into...

Duhem, Pierre Maurice Marie

(Encyclopedia)Duhem, Pierre Maurice Marie pyĕr mōrēsˈ märēˈ düĕmˈ [key], 1861–1916, French physicist and philosopher and historian of science. After studying at the École Normale Supérieure he taught ...

Danelaw

(Encyclopedia)Danelaw dānˈlôˌ [key], originally the body of law that prevailed in the part of England occupied by the Danes after the treaty of King Alfred with Guthrum in 886. It soon came to mean also the are...

creole language

(Encyclopedia)creole language krēōlˈ [key], any language that began as a pidgin but was later adopted as the mother tongue by a people in place of the original mother tongue or tongues. Examples are the Gullah o...

Clark, Tom Campbell

(Encyclopedia)Clark, Tom Campbell, 1899–1977, U.S. attorney general (1945–49), associate justice of the U.S. Supreme Court (1949–67), b. Dallas, Tex.; father of Ramsey Clark. He received his law degree from t...

second

(Encyclopedia)second, abbr. sec or s, fundamental unit of time in all systems of measurement. In practical terms, the second is 1/60 of a minute, 1/3,600 of an hour, or 1/86,400 of a day. Since the length of the da...

Pisistratus

(Encyclopedia)Pisistratus pīsĭsˈtrətəs [key], 605?–527 b.c., Greek statesman, tyrant of Athens. His power was founded on the cohesion of the rural citizens, whom he consolidated with farseeing land laws. His...