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geopolitics

(Encyclopedia)geopolitics, method of political analysis, popular in Central Europe during the first half of the 20th cent., that emphasized the role played by geography in international relations. Geopolitical theo...

Sturm und Drang

(Encyclopedia)Sturm und Drang shto͝orm o͝ont dräng [key] or Storm and Stress, movement in German literature that flourished from c.1770 to c.1784. It takes its name from a play by F. M. von Klinger, Wirrwarr; od...

yttrium

(Encyclopedia)yttrium ĭtˈrēəm [key] [for Ytterby, a town in Sweden], metallic chemical element; symbol Y; at. no. 39; at. wt. 88.90585; m.p. about 1,522℃; b.p. 3,338℃; sp. gr. about 4.45; valence +3. Yttriu...

mental hygiene

(Encyclopedia)mental hygiene, the science of promoting mental health and preventing mental illness through the application of psychiatry and psychology. A more commonly used term today is mental health. In 1908, th...

Menuhin, Yehudi

(Encyclopedia)Menuhin, Yehudi yəho͞oˈdē mĕnˈyo͞oĭn [key], 1916–99, British violinist and conductor, b. New York City. Menuhin, an extraordinary prodigy, began playing the violin at four. He made his debut...

Ludendorff, Erich

(Encyclopedia)Ludendorff, Erich āˈrĭkh lo͞oˈdəndôrf [key], 1865–1937, German general. A disciple of Schlieffen, he served in World War I as chief of staff to Field Marshal Hindenburg and was largely respon...

Young Plan

(Encyclopedia)Young Plan, program for settlement of German reparations debts after World War I. It was presented by the committee headed (1929–30) by Owen D. Young. After the Dawes Plan was put into operation (19...

hardness

(Encyclopedia)hardness, property of matter commonly described as the resistance of a substance to being scratched by another substance. The degree of hardness is relative, different substances being compared with o...

Göttingen

(Encyclopedia)Göttingen götˈĭng-ən [key], city, Lower Saxony, central Germany, on the Leine River. It is ...

Zinzendorf, Nikolaus Ludwig, Graf von

(Encyclopedia)Zinzendorf, Nikolaus Ludwig, Graf von nēˈkōlous lo͝otˈvĭkh gräf fən tsĭnˈtsəndôrf [key], 1700–1760, German churchman, patron and bishop of the refounded Moravian Church, b. Dresden. Rear...