x-axis

x-axis
/eks"ak'sis/, n., pl. x-axes /eks"ak'seez/. Math.
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. See diag. under abscissa.
2. (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.
[1925-30]

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Universalium. 2010.

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