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arteriosclerosis

(Encyclopedia)arteriosclerosis ärtĭrˌēōsklərōˈsis [key], general term for a condition characterized by thickening, hardening, and loss of elasticity of the walls of the blood vessels. These changes are freq...

turn and bank indicator

(Encyclopedia)turn and bank indicator, aircraft instrument containing one indicator to show turning, or rotation about the vertical axis, and another to show banking, or rotation about the longitudinal axis. The tw...

statics

(Encyclopedia)statics, branch of mechanics concerned with the maintenance of equilibrium in bodies by the interaction of forces upon them (see force). It incorporates the study of the center of gravity (see center ...

Messi, Lionel Andrés

(Encyclopedia)Messi, Lionel Andrés lyonālˈ ändrāsˈ māˈsē [key], 1987–, Argentinian-Spanish soccer player, b. Rosario, Argentina. He showed great talent early, and his family moved to Spain in 2000 when F...

excommunication

(Encyclopedia)excommunication, formal expulsion from a religious body, the most grave of all ecclesiastical censures. Where religious and social communities are nearly identical it is attended by social ostracism, ...

avalanche

(Encyclopedia)avalanche, rapidly descending large mass of snow, ice, soil, rock, or mixtures of these materials, sliding or falling in response to the force of gravity. Avalanches, which are natural forms of erosio...

weather vane

(Encyclopedia)weather vane or wind vane, instrument used to indicate wind direction. It consists of an asymmetrically shaped object, e.g., an arrow or a rooster, mounted at its center of gravity so it can move free...

honey

(Encyclopedia)honey, sweet, viscid fluid produced by honeybees from the nectar of flowers. The nectar is taken from the flower by the worker bee and is carried in the honey sac back to the hive. It is transformed i...

Gamow, George

(Encyclopedia)Gamow, George gămˈŏf [key], 1904–68, Russian-American theoretical physicist and author, b. Odessa. A nuclear physicist, Gamow is better known to the public for his excellent books popularizing ab...

phosphoric acid

(Encyclopedia)phosphoric acid, any one of three chemical compounds made up of phosphorus, oxygen, and hydrogen (see acids and bases). The most common, orthophosphoric acid, H3PO4, is usually simply called phosphori...