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kinetic art

(Encyclopedia)kinetic art, term referring to sculptured works that include motion as a significant dimension. The form was pioneered by Marcel Duchamp, Naum Gabo, and Alexander Calder. Kinetic art is either nonmech...

Wertheimer, Max

(Encyclopedia)Wertheimer, Max mäks vĕrtˈhīmər [key], 1880–1943, German psychologist, b. Prague. He studied at the universities of Prague, Berlin, and Würzburg (Ph.D., 1904). His original researches, while h...

weight lifting

(Encyclopedia)weight lifting, international sport, also a training technique for athletes in other sports. From the earliest times men have lifted weights as a test of strength. Long popular as a competitive sport ...

buoy

(Encyclopedia)buoy boi, bo͞oˈē [key], float anchored in navigable waters to mark channels and indicate dangers to navigation (isolated rocks, mine fields, cables, and the like). The shape, color, number, and mar...

canon, in music

(Encyclopedia)canon, in music, a type of counterpoint employing the strictest form of imitation. All the voices of a canon have the same melody, beginning at different times. Successive entrances may be at the same...

center of mass

(Encyclopedia)center of mass, the point at which all the mass of a body may be considered to be concentrated in analyzing its motion. The center of mass of a sphere of uniform density coincides with the center of t...

rib

(Encyclopedia)rib, one of the slender, elongated, curved bones that compose the chest cage in higher vertebrates. Ribs occur in pairs, and are found in most vertebrates; however, in some lower vertebrates, includin...

O'Toole, Peter

(Encyclopedia)O'Toole, Peter (Peter Seamus O'Toole), 1932–2013, British actor, b. Connemara, Ireland, grad. Royal Academy of Dramatic Art, London (1955). A classical stage actor, he appeared (1955–58) with the ...

Kropotkin, Piotr Alekseyevich, Prince

(Encyclopedia)Kropotkin, Piotr Alekseyevich, Prince pyôˈtər əlyĭksyāˈĭvĭch krəpôtˈkĭn [key], 1842–1921, Russian geographer and anarchist. He came from a wealthy princely family and as a boy was a pag...

Bertolucci, Bernardo

(Encyclopedia)Bertolucci, Bernardo bĕrnärˈdō bĕrˌtōlo͞otˈchē [key], 1940–2018, Italian film director and screenwriter, considered one of the finest Italian directors of his generation. The son of poet A...