y axes

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.
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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
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American Heritage
Science Dictionary
y-axis   (wī'āk'sĭs)  Pronunciation Key 
  1. The vertical axis of a two-dimensional Cartesian coordinate system.

  2. One of the three axes of a three-dimensional Cartesian coordinate system.


The American Heritage® Science Dictionary
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