# axis of ordinates

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## y-axis

[wahy-ak-sis]

- Also called axis of ordinates. (in a plane Cartesian coordinate system) the axis, usually vertical, along which the ordinate is measured and from which the abscissa is measured.
- (in a three-dimensional Cartesian coordinate system) the axis along which values of y are measured and at which both x and z equal zero.

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## Origin of y-axis^{}

First recorded in 1925–30

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## y-axis

- a reference axis, usually vertical, of a graph or two- or three-dimensional Cartesian coordinate system along which the y- 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

## y-axis

[wī′ăk′sĭs]

- The vertical axis of a two-dimensional Cartesian coordinate system.
- 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.