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Pius XII

(Encyclopedia)Pius XII, 1876–1958, pope (1939–58), an Italian named Eugenio Pacelli, b. Rome; successor of Pius XI. Ordained a priest in 1899, he entered the Vatican's secretariat of state. He became (1912) und...

Goliardic songs

(Encyclopedia)Goliardic songs gōlēärˈdĭk [key], Late Latin poetry of the “wandering scholars,” or Goliards. The Goliards included university students who went from one European university to another, schol...

Foss, Lukas

(Encyclopedia)Foss, Lukas fôs [key], 1922–2009, American composer, pianist, and conductor, b. Berlin as Lukas Fuchs. He came to the United States in 1937, attended the Curtis Institute in Philadelphia, studied c...

cesium

(Encyclopedia)cesium sēˈzēəm [key] [Lat.,=bluish gray], a metallic chemical element; symbol Cs; at. no. 55; at. wt. 132.90545; m.p. 28.4℃; b.p. 669.3℃; sp. gr. 1.873 at 20℃; valence +1. Cesium is a ductil...

computer music

(Encyclopedia)computer music, term used to describe music composed or performed with the aid of a computer. The first substantial piece of music composed on a computer was the Illiac Suite (1956) by the avant-garde...

Leo XIII, pope

(Encyclopedia)Leo XIII, 1810–1903, pope (1878–1903), an Italian (b. Carpineto, E of Rome) named Gioacchino Pecci; successor of Pius IX. Ordained in 1837, he earned an excellent reputation as archbishop of Perug...

muon

(Encyclopedia)muon myo͞oˈŏn [key], elementary particle heavier than an electron but lighter than other particles having nonzero rest mass. The name muon is derived from mu meson, the former name of the particle....

planetarium

(Encyclopedia)planetarium, optical device used to project a representation of the heavens onto a domed ceiling; the term also designates the building that houses such a device. A modern planetarium consists of as m...

psychotherapy

(Encyclopedia)psychotherapy, treatment of mental and emotional disorders using psychological methods. Psychotherapy, thus, does not include physiological interventions, such as drug therapy or electroconvulsive the...

meson

(Encyclopedia)meson mēˈzŏn [key] [Gr.,=middle (i.e., middleweight)], class of elementary particles whose masses are generally between those of the lepton class of lighter particles and those of the baryon class ...