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Frederick III, king of Denmark and Norway

(Encyclopedia)Frederick III, 1609–70, king of Denmark and Norway (1648–70), son and successor of Christian IV. He at first made great concessions to the powerful nobles but later asserted his own power. In 1657...

geochemistry

(Encyclopedia)geochemistry, study of the chemical changes on the earth. More specifically, it is the study of the absolute and relative abundances of chemical elements in the minerals, soils, ores, rocks, water, an...

pitch, in music

(Encyclopedia)pitch, in music, the position of a tone in the musical scale, today designated by a letter name and determined by the frequency of vibration of the source of the tone. Pitch is an attribute of every m...

Royce, Josiah

(Encyclopedia)Royce, Josiah, 1855–1916, American philosopher, b. California, grad. Univ. of California, 1873. After studying in Germany and at Johns Hopkins, he returned to California to teach (1878–82). From 1...

Avicenna

(Encyclopedia)Avicenna ăvĭsĕnˈə [key], Arabic Ibn Sina, 980–1037, Islamic philosopher and physician, of Persian origin, b. near Bukhara. He was the most renowned philosopher of medieval Islam and the most in...

tensor

(Encyclopedia)tensor, in mathematics, quantity that depends linearly on several vector variables and that varies covariantly with respect to some variables and contravariantly with respect to others when the coordi...

Hittite art and architecture

(Encyclopedia)Hittite art and architecture, works of art and structures created by the ancient Hittites The principal architectural remnant of the Hittite civilization is at Boğazköy, where temple structures ...

Gibraltar

(Encyclopedia)Gibraltar jĭbrôlˈtər [key], British overseas territory (2015 est. pop. 34,000), 2.5 sq mi (6.5 sq km), on a narrow, rocky peninsula extending into the Mediterranean Sea from SW Spain. Most of the ...

Scandinavian art and architecture

(Encyclopedia)Scandinavian art and architecture, works of art and structures created in the Scandinavian area of Europe. The Swedish sculptor Carl Milles, who worked extensively in the United States, was among th...

tobacco

(Encyclopedia)tobacco, name for any plant of the genus Nicotiana of the Solanaceae family (nightshade family) and for the product manufactured from the leaf and used in cigars and cigarettes, snuff, and pipe and ch...