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London Company

(Encyclopedia)London Company, corporation composed of stockholders residing in and about London, which, together with the Plymouth Company (see Virginia Company), was granted (1606) a charter by King James I to fou...

plutonium

(Encyclopedia)plutonium plo͞otōˈnēəm [key], radioactive chemical element; symbol Pu; at. no. 94; mass no. of most stable isotope 244; m.p. 641℃; b.p. 3,232℃; sp. gr. 19.84 at 20℃; valence +3, +4, +5, or ...

photographic processing

(Encyclopedia)photographic processing, set of procedures by which the latent, or invisible, image produced when a photographic film is exposed to light is made into a permanent visible image. The negative may b...

art conservation and restoration

(Encyclopedia)art conservation and restoration, the preservation of structurally sound works of art, the halting of processes that lead to the damage of works of art, and the repair of already damaged works of art....

tunnel

(Encyclopedia)tunnel, underground passage usually made without removing the overlying rock or soil. Although tunnels are approximately horizontal, they must be built with sufficient gradient for proper drainage. Tu...

Hubble's law

(Encyclopedia)Hubble's law, in astronomy, statement that the distances between galaxies (see galaxy) or clusters of galaxies are continuously increasing and that therefore the universe is expanding. Hubble's law ...

criminology

(Encyclopedia)criminology, the study of crime, society's response to it, and its prevention, including examination of the environmental, hereditary, or psychological causes of crime, modes of criminal investigation...

laser

(Encyclopedia)CE5 Ordinary light sources produce incoherent light, while a laser produces a beam of coherent light. laser [acronym for light amplification by stimulated emission of radiation], device for the cr...

Barrymore

(Encyclopedia)Barrymore, Anglo-American family of actors. Lionel and Ethel's younger brother, John Barrymore,John Barrymore, 1882–1942, b. Philadelphia, tried his hand at painting and cartooning before turning ...

band

(Encyclopedia)band, in music, a group of musicians playing principally on wind and percussion instruments, usually outdoors. Prior to the 18th cent., the term band was frequently applied in a generic sense to cover...