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rectangular coordinate

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noun Mathematics.
  1. Usually rectangular coordinates. either of two Cartesian coordinates in which the axes meet at right angles.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for rectangular coordinates

rectangular coordinates

pl n
  1. the Cartesian coordinates in a system of mutually perpendicular axes
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