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ammonia

(Encyclopedia)ammonia, chemical compound, NH3, colorless gas that is about one half as dense as air at ordinary temperatures and pressures. It has a characteristic pungent, penetrating odor. Ammonia forms a minute ...

Einstein, Albert

(Encyclopedia)Einstein, Albert īnˈstīn [key], 1879–1955, American theoretical physicist, known for the formulation of the relativity theory, b. Ulm, Germany. He is recognized as one of the greatest physicists ...

Bach, Johann Sebastian

(Encyclopedia)Bach, Johann Sebastian bäkh [key], 1685–1750, German composer and organist, b. Eisenach; one of the greatest and most influential composers of the Western world. He brought polyphonic baroque musi...

William II, emperor of Germany and king of Prussia

(Encyclopedia)William II, 1859–1941, emperor of Germany and king of Prussia (1888–1918), son and successor of Frederick III and grandson of William I of Germany and of Queen Victoria of England. After the out...

Frankfurt

(Encyclopedia)Frankfurt äm mīn [key], city (2021 pop. 841,795), Hesse, central Germany, a port on the Mai...

theology

(Encyclopedia)theology thēŏlˈəjē [key], in Christianity, the systematic study of the nature of God and God's relationship with humanity and with the world. Although other religions may be said to have theologi...

anti-Semitism

(Encyclopedia)anti-Semitism ănˌtē-sĕmˈĭtĭzˌəm, ănˌtī– [key], form of prejudice against Jews, ranging from antipathy to violent hatred. Before the 19th cent., anti-Semitism was largely religious and wa...

history

(Encyclopedia)history, in its broadest sense, is the story of humanity's past. It also refers to the recording of that past. The diverse sources of history include books, newspapers, printed documents, personal pap...

Danish literature

(Encyclopedia)Danish literature, the literature of Denmark. By 1900 a lyrical reaction was being led by the poet J. J. Jørgensen; impressionistic themes became important, but were never the sole fruit of Danish ...

serf

(Encyclopedia)serf, under feudalism, peasant laborer who can be generally characterized as hereditarily attached to the manor in a state of semibondage, performing the servile duties of the lord (see also manorial ...