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Alembert, Jean le Rond d'

(Encyclopedia)Alembert, Jean le Rond d' zhäN lərôNˈ däläNbĕrˈ [key], 1717–83, French mathematician and philosopher. The illegitimate son of the chevalier Destouches, he was named for the St. Jean le Rond ...

D'Alembert's principle

(Encyclopedia)D'Alembert's principle dălˈəmbârzˌ [key], in mechanics, principle permitting the reduction of a problem in dynamics to one in statics. This is accomplished by introducing a fictitious force equal...

Argenson, Marc Pierre de Voyer de Paulmy, comte d'

(Encyclopedia)Argenson, Marc Pierre de Voyer de Paulmy, comte d' märk pyĕr də vwäyāˈ də pōmēˈ kôNt därzhäNsôNˈ [key], 1696–1764, French statesman and patron of literature; younger brother of René ...

Le Clerc, Jean

(Encyclopedia)Le Clerc, Jean lə klĕrˈ [key], Latin Johannes Clericus, 1657–1736, Swiss Arminian theologian and biblical scholar. He preached in France and in London, then, drawn to the teachings of the Dutch ...

Le Pen, Jean-Marie

(Encyclopedia)Le Pen, Jean-Marie zhŏnˌ-märēˈ lə pĕn, pŏN [key], 1928–, French politician. He graduated from law school, was elected (1956) a parliamentary deputy, and criticized President de Gaulle's Alge...

Le Verrier, Urbain Jean Joseph

(Encyclopedia)Le Verrier, Urbain Jean Joseph ürbăNˈ zhäN zhôzĕfˈ ləvĕryāˈ [key], 1811–77, French astronomer who made calculations that led to the discovery of the planet Neptune. In considering the per...

Rancé, Armand Jean le Bouthillier de

(Encyclopedia)Rancé, Armand Jean le Bouthillier de ärmäNˈ zhäN lə bo͞otēyāˈ də räNsāˈ [key], 1626–1700, French religious reformer, founder of the Trappists. He was of a noble family, was well educat...

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