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Sisters of Charity

(Encyclopedia)Sisters of Charity, in the Roman Catholic Church, name of many independent communities of women. Most of them owe their origin to the institute of St. Vincent de Paul, founded (1634) for works of merc...

Clarendon, Constitutions of

(Encyclopedia)Clarendon, Constitutions of, 1164, articles issued by King Henry II of England at the Council of Clarendon defining the customs governing relations between church and state. In the anarchic conditions...

balance of power

(Encyclopedia)balance of power, system of international relations in which nations seek to maintain an approximate equilibrium of power among many rivals, thus preventing the preponderance of any one state. Crucial...

diseases of plants

(Encyclopedia)diseases of plants. Most plant diseases are caused by fungi, bacteria, and viruses. Although the term disease is usually used only for the destruction of live plants, the action of dry rot and the rot...

Doctrine of Signatures

(Encyclopedia)Doctrine of Signatures, the concept that the key to humanity's use of various plants was indicated by the form of the plant. The red sap of the bloodroot (Sanguinaria canadensis), for instance, was be...

energy, sources of

(Encyclopedia)energy, sources of, origins of the power used for transportation, for heat and light in dwelling and working areas, and for the manufacture of goods of all kinds, among other applications. The develop...

philosophy of science

(Encyclopedia)philosophy of science, branch of philosophy that emerged as an autonomous discipline in the 19th cent., especially through the work of Auguste Comte, J. S. Mill, and William Whewell. Several of the is...

Azov, Sea of

(Encyclopedia)Azov, Sea of, Gr. Maiotis, Lat. Palus Maeotis, ancient Rus. Surozhskoye, northern arm of the Black Sea, c.14,000 sq mi (36,300 sq km), shared by S European Russia and E Ukraine. The shallow sea (maxim...

Pepin of Heristal

(Encyclopedia)Pepin of Heristal (Pepin II) pĕpˈĭn [key], d. 714, mayor of the palace (680–714) of the Frankish territory of Austrasia; grandson of Pepin of Landen and father of Charles Martel. After defeating...

Duris of Samos

(Encyclopedia)Duris of Samos do͞oˈrĭs [key], fl. 3d cent. b.c., Greek historian. A descendent of Alcibiades, Duris was tyrant of Samos for a time. He wrote Samian Chronicle—a history of Samos—and a rambling ...