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sexagesimal

[sek-suh-jes-uh-muh l]
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adjective
  1. pertaining to or based upon the number 60.
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noun
  1. a fraction whose denominator is 60 or a power of 60.
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Origin of sexagesimal

From the Medieval Latin word sexāgēsimālis, dating back to 1675–85. See Sexagesima, -al1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for sexagesimal

sexagesimal

adjective
  1. relating to or based on the number 60sexagesimal measurement of angles
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noun
  1. a fraction in which the denominator is some power of 60; a sixtieth
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sexagesimal

adj.

"pertaining to 60," 1680s, from Medieval Latin sexagesimalis, from Latin sexagesimus "the sixtieth," from sexaginta "sixty."

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Online Etymology Dictionary, © 2010 Douglas Harper