# y-axis

## y-axis

[wahy-ak-sis]
noun, plural y-axes [wahy-ak-seez] . Mathematics.
1.
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. See diag. under ordinate.
2.
(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.

Origin:
1925–30

x-axis, y-axis.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
 y-axis —n a reference axis, usually vertical, of a graph or two- or three-dimensional Cartesian coordinate system along which the y-coordinate is measured

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
 y-axis   (wī'āk'sĭs)  Pronunciation Key  The vertical axis of a two-dimensional Cartesian coordinate system. One of the three axes of a three-dimensional Cartesian coordinate system.
The American Heritage® Science Dictionary
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Example sentences
The first division is within the x-axis, the second within the y-axis then the
third in the z-axis before repeating itself.
Doing so would move many of the schemes with a positive value on the y-axis
into negative territory.
What you see on the x-axis are ages of individuals, and on the y-axis the
expected years of life at that age.
The x-axis is the first principal component of variation, and the y-axis the
second.
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