Cartesian axis

Cartesian axis

[kär′tē·zhən ′ak·səs]
(mathematics)
One of a set of mutually perpendicular lines which all pass through a single point, used to define a cartesian coordinate system; the value of one of the coordinates on the axis is equal to the directed distance from the intersection of axes, while the values of the other coordinates vanish.
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References in periodicals archive ?
4) is taken when the thermal camera is situated right perpendicular to the patient while the ensemble is moving on the horizontal Cartesian axis.
The line structure can be rotated about each Cartesian axis or exhibited as an approximate space-filling model.