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Tunney, Gene

(Encyclopedia)Tunney, Gene (James Joseph Tunney), 1898–1978, American boxer, b. New York City. He began boxing in neighborhood clubs as a youngster. In World War I, he served in the U.S. marines and while in Pari...

sucrose

(Encyclopedia)sucrose so͞oˈkrōs [key], commonest of the sugars, a white, crystalline solid disaccharide (see carbohydrate) with a sweet taste, melting and decomposing at 186℃ to form caramel. It is known commo...

photocopying

(Encyclopedia)photocopying, process whereby written or printed matter is directly copied by photographic techniques. Generally, photocopying is practical when just a few copies of an original are needed. When many ...

Renoir, Pierre Auguste

(Encyclopedia)Renoir, Pierre Auguste rənwärˈ [key], 1841–1919, French impressionist painter and sculptor, b. Limoges. Renoir went to work at the age of 13 in Paris as a decorator of factory-made porcelain, co...

radiation

(Encyclopedia)radiation rāˌdēāˈshən [key], term applied to the emission and transmission of energy through space or through a material medium and also to the radiated energy itself. In its widest sense the te...

ozone

(Encyclopedia)ozone ōˈzōn [key], an allotropic form of the chemical element oxygen (see allotropy). Pure ozone is an unstable, faintly bluish gas with a characteristic fresh, penetrating odor. The gas has a dens...

variable star

(Encyclopedia)variable star, star that varies, either periodically or irregularly, in the intensity of the light it emits. Other physical changes are usually correlated with the fluctuations in brightness, such as ...

Lebedev, Pyotr Nikolaevich

(Encyclopedia)Lebedev, Pyotr Nikolaevich pyôˈtə nyĭkəlīˈəvĭch lāˈbyədyəf [key], 1866–1912, Russian physicist. The most noted Russian physicist of his time, he studied at Strasbourg and Berlin and was...

Montreuil

(Encyclopedia)Montreuil môNtröˈyə [key], town (1990 pop. 95,038), Seine–Saint-Denis dept., N central France, a suburb of Paris. Long famous for its peaches and pears, Montreuil has a variety of light industri...

levitation

(Encyclopedia)levitation lĕvĭtāˈshən [key], the raising of a human or other body in the air without mechanical aid. The idea is ancient; holy men, both pagan and Christian, were reputed to have had the power o...