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brain
(Encyclopedia) CE5 Brain brain, the supervisory center of the nervous system in all vertebrates. It also serves as the site of emotions, memory, self-awareness, and thought. Brain research, now often referred ...chemistry
(Encyclopedia)chemistry, branch of science concerned with the properties, composition, and structure of substances and the changes they undergo when they combine or react under specified conditions. Organic chemi...pyramid, structure
(Encyclopedia)pyramid. The true pyramid exists only in Egypt and Sudan, though the term has also been applied to similar structures in other countries. Egyptian pyramids are square in plan and their triangular side...European Southern Observatory
(Encyclopedia)European Southern Observatory (ESO), an intergovernmental organization for astronomical research with headquarters in Garching, near Munich, Germany. The ESO began in 1962 as a consortium among Belgiu...lobster
(Encyclopedia)lobster, marine crustacean with five pairs of jointed legs, the first bearing large pincerlike claws of unequal size adapted to crushing the shells of its prey. The segmented body of the lobster consi...pantheism
(Encyclopedia)pantheism pănˈthēĭzəm [key] [Gr. pan=all, theos=God], name used to denote any system of belief or speculation that includes the teaching “God is all, and all is God.” Pantheism, in other word...amphetamine
(Encyclopedia)amphetamine ămfĕtˈəmēn [key], any one of a group of drugs that are powerful central nervous system stimulants. Amphetamines have stimulating effects opposite to the effects of depressants such as...air-cushion vehicle
(Encyclopedia) CE5 Air-cushion vehicle: In vehicles modified with a trunk or skirt (A), the rate of leakage is reduced and less power is needed to maintain the cushion. Vehicles designed to travel over deep water...airplane
(Encyclopedia) CE5 A. Side view of jet-propelled airplane B. Top view airplane, aeroplane, or aircraft, heavier-than-air vehicle, mechanically driven and fitted with fixed wings that support it in flight thro...internal-combustion engine
(Encyclopedia) CE5 Internal-combustion engines: In the four-stroke reciprocating engine (above), a mixture of fuel and air is taken into the chamber on the down-stroke of the piston, is compressed on the up-strok...Browse by Subject
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