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z-axis

[zee-ak-sis]
noun, plural z-ax·es [zee-ak-seez] /ˈziˌæk siz/. Mathematics.
  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.
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Origin of z-axis

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for z-axis

z-axis

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

z-axis

[zē′ăk′sĭs]
  1. One of the three axes of a three-dimensional Cartesian coordinate system.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.