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altazimuth coordinate system

(Encyclopedia)altazimuth coordinate system ăltăzˈəməth [key] or horizon coordinate system, astronomical coordinate system in which the position of a body on the celestial sphere is described relative to an obs...

pitot static system

(Encyclopedia)pitot static system pētōˈ [key], device for measuring the rate at which a fluid flows. Among the principal applications of the device are an airspeed indicator for aircraft and a distance and speed...

transdermal delivery system

(Encyclopedia)transdermal delivery system: see skin patch. ...

ring, mathematical system

(Encyclopedia)ring, in mathematics, system consisting of a set R of elements and two binary operations, such that addition makes R a commutative group and multiplication is associative and distributes over addition...

parasympathetic nervous system

(Encyclopedia)parasympathetic nervous system: see nervous system. ...

peripheral nervous system

(Encyclopedia)peripheral nervous system: see nervous system. ...

autonomic nervous system

(Encyclopedia)autonomic nervous system: see nervous system. ...

sympathetic nervous system

(Encyclopedia)sympathetic nervous system: see nervous system. ...

Space Transportation System

(Encyclopedia)Space Transportation System, official designation for the U.S. space shuttle. ...

central nervous system

(Encyclopedia)central nervous system: see nervous system. ...