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water power

(Encyclopedia)water power, mechanical energy derived from falling or flowing water, e.g., rivers, streams, and the overflow of dams. The wooden water wheel, long utilized for driving machinery in flour mills and fa...

Mesolithic period

(Encyclopedia)Mesolithic period mĕzˌəlĭthˈĭk [key] or Middle Stone Age, period in human development between the end of the Paleolithic period and the beginning of the Neolithic period. It began with the end o...

Marcos, Ferdinand Edralin

(Encyclopedia)Marcos, Ferdinand Edralin fārdēnändˈ ĕdˈrälēnˌ märˈkōs [key], 1917–89, Philippine political leader. A lawyer and aide to Manuel Roxas (1946–47), he was elected to congress in 1949, ser...

pear

(Encyclopedia)pear, name for a fruit tree of the genus Pyrus of the family Rosaceae (rose family) and for its fruit, a pome. The common pear (P. communis) is one of the earliest cultivated of fruit trees, both in i...

Pietism

(Encyclopedia)Pietism pīˈətĭzəm [key], a movement in the Lutheran Church (see Lutheranism), most influential between the latter part of the 17th cent. and the middle of the 18th. It was an effort to stir the c...

wrestling

(Encyclopedia)wrestling, sport in which two unarmed opponents grapple with one another. The object is to secure a fall, i.e., cause the opponent to lose balance and fall to the floor, and ultimately to pin the supi...

Sites of the Modern Olympic Games (table)

(Encyclopedia)Sites of the Modern Olympic Games Summer Games Winter Games ...

Lotharingia

(Encyclopedia)Lotharingia lŏthərĭnˈjə [key], name given to the northern portion of the lands assigned (843) to Emperor of the West Lothair I in the first division of the Carolingian empire (see Verdun, Treaty ...

cult

(Encyclopedia)cult, ritual observances involved in worship of, or communication with, the supernatural or its symbolic representations. A cult includes the totality of ideas, activities, and practices associated wi...

Agassiz, Louis

(Encyclopedia)Agassiz, Louis (Jean Louis Rodolphe Agassiz) ăgˈəsē [key], 1807–73, Swiss-American zoologist and geologist, b. Môtiers-en-Vuly, Switzerland. He studied at the universities of Zürich, Erlangen ...