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SARS

(Encyclopedia)SARS or severe acute respiratory syndrome, communicable viral disease that can progress to a potentially fatal pneumonia. The first symptoms of SARS are usually a high fever, headache and body aches, ...

radiator

(Encyclopedia)radiator, device used to heat an area surrounding it or to cool a fluid circulating within it. The familiar radiators of steam and hot water heating systems in buildings are misnamed, as they operate ...

Botticelli, Sandro

(Encyclopedia)Botticelli, Sandro älĕssänˈdrō dē märēäˈnō fēlēpāˈpē [key]. He was apprenticed to Fra Filippo Lippi, whose delicate coloring can be seen in such early works as the Adoration of the Kin...

sonar

(Encyclopedia)sonar sōˈnär [key], device used underwater for locating submerged objects and for submarine communication by means of sound waves. The term sonar is an acronym for sound navigation ranging. The mai...

Manichaeism

(Encyclopedia)Manichaeism mănĭkēˈənĭzəm [key], religion founded by Mani (c.216–c.276). Several Christian emperors, including Justinian, published edicts against the Manichees. St. Augustine, in his yout...

sexually transmitted disease

(Encyclopedia)sexually transmitted disease (STD) or venereal disease, term for infections acquired mainly through sexual contact. Five diseases were traditionally known as venereal diseases: gonorrhea, syphilis, an...

Armada, Spanish

(Encyclopedia)Armada, Spanish ärmäˈdə [key], 1588, fleet launched by Philip II of Spain for the invasion of England, to overthrow the Protestant Elizabeth I and establish Philip on the English throne; also call...

Magyars

(Encyclopedia)Magyars mŏdˈyärz, măgˈyärz [key], the dominant people of Hungary, but also living in Romania, Ukraine, Slovakia, and Serbia. Although in the past it was thought a common origin existed among the...

equilibrium

(Encyclopedia)CE5 Equilibrium equilibrium, state of balance. When a body or a system is in equilibrium, there is no net tendency to change. In mechanics, equilibrium has to do with the forces acting on a body. ...

circle

(Encyclopedia)CE5 Circle circle, closed plane curve consisting of all points at a given distance from some fixed point, called the center. A circle is a conic section cut by a plane perpendicular to the axis of...