# z-axis

[zee-ak-sis]

- (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

## z-axis

- 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

[zē′ăk′sĭs]

- 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.