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From Encyclopedia of Mathematics
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A unit of measurement of plane angles that is equal to 1/3600th of a degree, or 1/60th of a minute; it is denoted by the symbol . A metric second is -th of a right angle; it is denoted by the symbol .

How to Cite This Entry:
Second. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Second&oldid=18644