Axis-of-abscissas
x-axis (def 1).
also called axis of abscissas. (in a plane cartesian coordinate system) the axis, usually horizontal, along which the abscissa is measured and from which the ordinate is measured.
(in a three-dimensional cartesian coordinate system) the axis along which values of x are measured and at which both y and z equal zero.
noun
a reference axis, usually horizontal, of a graph or two- or three-dimensional cartesian coordinate system along which the x-coordinate is measured
x-axis
(ěks’āk’sĭs)
the horizontal axis of a two-dimensional cartesian coordinate system.
one of the three axes of a three-dimensional cartesian coordinate system.
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