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z-axis

[ zee-ak-sis ]

noun

, Mathematics.
, plural z-ax·es [zee, -ak-seez].
  1. (in a three-dimensional Cartesian coordinate system) the axis along which values of z are measured and at which both x and y equal zero.


z-axis

noun

  1. a reference axis of a three-dimensional Cartesian coordinate system along which the z- coordinate is measured
“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

z-axis

/ ăk′sĭs /

  1. One of the three axes of a three-dimensional Cartesian coordinate system.
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Word History and Origins

Origin of z-axis1

First recorded in 1945–50
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Example Sentences

A dreamy undated watercolor by Charles Lamb is just one example of the many times people have imagined the Cartesian street grid continuing up a z-axis to connect mammoth buildings with aerial walkways.

To represent equations involving three unknowns x, y, z, a third axis is introduced, the z-axis, perpendicular to the plane xy and passing through the intersection of the lines x, y.

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