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cooling system

(Encyclopedia)cooling system: see air conditioning; internal-combustion engine; refrigeration. ...

urinary system

(Encyclopedia)CE5 Urinary system urinary system, group of organs of the body concerned with excretion of urine, that is, water and the waste products of metabolism. In humans, the kidneys are two small organs s...

instrument-landing system

(Encyclopedia)CE5 Instrument-landing system (ILS), the most common instrument-landing approach system, uses two beams to guide an airplane. instrument-landing system (ILS), ground-based radio system designed to...

Chinese examination system

(Encyclopedia)Chinese examination system, civil service recruitment method and educational system employed from the Han dynasty (206 b.c.–a.d. 220) until it was abolished by the Ch'ing dowager empress Tz'u Hsi in...

autonomic nervous system

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

parasympathetic nervous system

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

sympathetic nervous system

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

peripheral nervous system

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

central nervous system

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

horizon coordinate system

(Encyclopedia)horizon coordinate system: see altazimuth coordinate system. ...