Columbia Encyclopedia

Search results

473 results found

Du Pont, Samuel Francis

(Encyclopedia)Du Pont, Samuel Francis, 1803–65, American naval officer, b. Bergen Point, N.J.; grandson of Pierre Samuel du Pont de Nemours. Appointed a midshipman in 1815, he saw his first active duty in the Med...

aleatory music

(Encyclopedia)aleatory music āˈlēətôrˌē [key] [Lat. alea=dice game], music in which elements traditionally determined by the composer are determined either by a process of random selection chosen by the comp...

Percier, Charles

(Encyclopedia)Percier, Charles shärl pĕrsyāˈ [key], 1764–1838, French architect. He won (1786) the Grand Prix de Rome, and in 1794 he became associated with Pierre François Léonard Fontaine. Napoleon appoin...

Vergennes, Charles Gravier, comte de

(Encyclopedia)Vergennes, Charles Gravier, comte de shärl grävyāˈ kôNt də vĕrzhĕnˈ [key], 1717–87, French statesman. After serving as ambassador at Trier, Constantinople, and Stockholm (where in 1772 he p...

Turner, John Napier Wyndham

(Encyclopedia)Turner, John Napier Wyndham, 1929–2020, Canadian prime minister (1984). Born in England, he immigrated (1932) to Ontario with his Canadian-born mother after she was widowed. Trained as a lawyer, he ...

theorem

(Encyclopedia)theorem, in mathematics and logic, statement in words or symbols that can be established by means of deductive logic; it differs from an axiom in that a proof is required for its acceptance. A lemma i...

Royal Concertgebouw Orchestra

(Encyclopedia)Royal Concertgebouw Orchestra, founded 1888, one of the world's foremost orchestras. It performs at the Royal Concertbegouw [concert building], Amsterdam, Netherlands, designed by Adolf Leonard van Ge...

piezoelectric effect

(Encyclopedia)piezoelectric effect pīēˌzōĭlĕkˈtrĭk [key], voltage produced between surfaces of a solid dielectric (nonconducting substance) when a mechanical stress is applied to it. A small current may be ...

balloon

(Encyclopedia)balloon, lighter-than-air craft without a propulsion system, lifted by inflation of one or more containers with a gas lighter than air or with heated air. During flight, altitude may be gained by disc...

French Academy

(Encyclopedia)French Academy (L'Académie française), learned society of France. It is one of the five societies of the Institut de France. The work of the French Academy has chiefly consisted of the preparation...